Ultimate Preamplifier/Processor/DAC for Hi-end and Pro-Audio applications

Introduction

The Ultimate Preamplifier is a game changer for the pre-processing of audio signals in both the digital and analog domains before the signals are fed to the power amplifiers. For the first time you have three different functions in one package and which do not compromise in any application. These are the DSP Stereo Preamplifier, DSP Multi-Channel Pre-amplifier/Crossover/Signal Processor, and Direct-through-DAC ultra-high quality stereo DAC. All three functions employ the outstanding performance capability of the ES9028PRO second generation 32-bit Hyper Stream II Sabre DAC from ESS Technologies.

Multi-function Hi-end DSP based Preamplifier

Firstly, the Ultimate-Preamp can function as a stand-alone stereo or multi-channel preamp which can process both analog or digital signals including signals from a magnetic cartridge. Precision RIAA equalization is done in the digital domain by an Analog Devices 4th generation SHARC DSP within a 0.01dB tolerance of the inverse RIAA curve and without the problems of a passive design. Unlike analog or passive designs, multiple RIAA curves can be easily accommodated simply by changing the digital filter coefficients whilst still maintaining precise conformance with the standards. Other digital sources can be processed from any one of six galvanically isolated S/PDIF sources and one galvanically isolated I2S interface. In addition, through its galvanically isolated USB interface it can also process PCM up to 192KHz and DSD 64/128/256 source material.

4th Generation SHARC DSP from Analog Devices

Secondly with its 8 full channels of DSP processing the Ultimate Preamp can form the basis of a stereo 2/3/4 way active stereo speaker system (or 8-way mono) with precision crossover functionality using the full 80 bits fixed point precision or 40 bits floating point precision of an Analog Devices 4th generation SHARC DSP. The Ultimate-Preamp is in a class of its own. With the Link Port adaptor, it is possible to chain two or more boards together for more channels and/or processing power with no latency issues. This allows self-contained fully active speakers to be designed.

On-board native DSD processing

For the first time a multi-way DSP based crossover can accept and directly process Direct Stream Digital (DSD) Audio through its own proprietary on-board DSD processing engine without any software overheads or having to convert it to an analog signal first to be resampled by an Analog to Digital converter. DSD is usually neglected on DSP board offerings simply because to do it in software by the DSP would consume a large proportion of the DSP resources or in many cases require an additional DSP ! We've solved this problem by building a DSD decoding engine from the ground up into the on-board custom logic hardware. From DSD-64 all the way up to DSD-256 the on-board DSP decoding engine can process it with ease whilst the DSP is free to do other processing.

Standalone Hi-end stereo DAC with precision volume control

Lastly the Ultimate-Preamp can function as a high quality stand-alone stereo DAC. With the industries best DAC hardware and the ability to process digital signals in both PCM and DSD formats from a number of sources including S/PDIF, Toslink, USB-2 audio and I2S. In this case the DSP is not used to process the audio. It is only used for the house keeping functions such as programming the DAC, display information on the LCD display etc.

In all three operating modes, bit-perfect volume and channel level controls are accomplished with true 32-bit precision irrespective of the source and mode of operation. This equals or betters the performance of the best analog volume controls but with the precision, reliability and noise free operation from digital signal processing.

 

Low phase noise reference clocks

The heart of any digital audio system is a precision low phase noise clock generator coupled with a clock distribution network and in this instance we didn't disappoint. We used the best low jitter clock oscillators from NRZ along with low noise power supplies so that clock purity is maintained. The clock signal from the oscillator is then buffered through a dedicated clock distribution chip and routed to the other devices on the board using impedance controlled traces and the shortest possible trace length thus adding negligible jitter to the clock signals.

Intuitive user interface

To communicate with the user, we didn't just leave them in the dark with a non-existent user interface or one that exclusively relies on lugging a PC around! We've incorporated the necessary hardware to build an intuitive user interface. A fast pixel rendering, high resolution full color graphic LCD display coupled with navigation controls provides a context sensitive menu system. For user controls we added a rotary control which doubles as a master volume and menu adjustment control. Along with five navigation buttons the menu is both easy and intuitive to navigate. Seven dimmable status LEDS provide real time status of various conditions. Finally, an infrared remote control interface which is compatible with a standard Apple remote essentially duplicates the functionality of the navigation buttons.

 

Perfect Word Sync with Perfect-Link and Zero-Phase

We spent a lot of time perfecting the hardware and firmware for system integration applications. For the ultimate in standalone active speakers each of which would have its own DSP processing hardware we provide the means of linking speakers together so that each board operates in perfect word sync right down to the resolution of each boards on-board master reference clock period of 20 nS ! Typically, other DSP systems ignore this often-overlooked issue and run their boards asynchronously to each other so it's not uncommon for them to drift out of sync by a few word clocks at best simply because there is no means of synchronizing them together. Worse still they can slip out of sync by up to one hundred word clocks per second depending on the tolerance of each boards master clock. To compound the issue is how to split the incoming digital audio signal from a single USB or S/PDIF connector and make it available to multiple DSP boards?

Our proprietary on board Perfect-Link hardware enables multiple DSP boards to be linked together using a simple connection whilst still being clocked from their own on-board low phase noise master clocks. This results in zero-phase shift between the DAC’s on each separate board as though all of the DAC’s were located on the one single board and being clocked from the same low phase noise master clock!

For standalone speaker applications all that is required to link the speakers is a Simple-Link cable which can be obtained in lengths of up to 5 meters! No more messy and expensive speaker cables running around the floor! Whether you are building a simple active two-way speaker system or multi-way behemoth each with its own self-contained DSP and amplifiers it is mandatory to maintain perfect synchronization otherwise there will be undesirable phase delays between the speakers and that just isn't considered hi-end these days! Looking at it another way, would you tolerate a standalone DAC which had considerable delay between left and right channels? No you would think it had a design flaw and yet many people operate DSP hardware in this way!

Premium components

Unlike other DSP vendors boards built with the lowest cost in mind we didn't skimp on quality when the benefits considerably outweighed the increase in cost which is why we specced in a DAC that cost at least fifty times more than the cheap one dollar DAC's typically found in other DSP products ! We've spared no expense when it comes to component selection using the best quality passive components where appropriate. Premium audio grade capacitors such as Nichicon, Roderstein, Wima and NP0/COG ceramic capacitors in both the signal path and power supply make sure signal fidelity is preserved. Other DSP vendors will hope that you don't notice the skimp on quality and lack of attention to detail in their products but we believe you deserve better.

Bespoke custom logic design

In addition to the DSP we have incorporated two large gate count custom logic devices to do tasks that would be difficult if not impossible to achieve in the DSP. Code named 'Rubidium' and 'Iridium' after their respective chemical elements. Like the use of its chemical counterpart in precision atomic clocks the Rubidium custom chip provides precision timing signals to the DSP, DAC and ADC as well as support for the processing of native DSD data streams which would otherwise consume a large portion of the DSP capacity that would no longer be available to other audio processing needs. The Iridium device performs ancillary functions such as glue logic and support for the LCD display without the need for a second microcontroller.

Tube emulation

For the tube aficionados out there we have incorporated a number of software plugins which behave like tubes without the physical tubes installed in the system. Typically, a DAC or preamp would use tubes to add some of that classic rich tube sound and texture to the mix. Instead we have accomplished this using the DSP in the form of tube emulation and soft clipping. Using a DSP to mimic the sound of tubes is nothing new. The pro-audio industry has been using this technique in its studio mixes to emulate the sound of the great classic tube recording equipment of the past. We've just taken this idea one step further and applied it to the reproduction chain!

For the first time we provide classic SET (single ended triode) sound with relatively inefficient speakers and solid state amplification all without the inefficiencies of a class 'A' single ended tube amp of the same power rating. Now there is no need to own a pair of exotic horn speakers just to enjoy that classic SET amplifier sound! As long as your solid state amp never clips you would never know you were running solid state amplification! We also provide various tube configurations with different distortion profiles and grid bias settings so that you have total control of the sound. Gain matching between different settings means that you can actually do objective comparisons without being fooled by changes in level.

Drag and Drop DSP design software

Of course all of this capability would be rendered useless if it could not be customized for the application at hand. To this end we have employed the expertise of DSP Concepts of California to incorporate Audio Weaver as part of our on-board firmware. Audio Weaver from DSP Concepts is an innovative design environment for developing optimized embedded audio software. It embodies years of audio product development experience and enables algorithm and product developers to more quickly and efficiently develop products and technology.

Typically to program a DSP would require a thorough understanding of the underlying hardware and digital signal processing concepts along with years of programming experience in a high level language such as 'C' or C++. In other words, not shy of having a degree in electronics or computer science for starters! Audioweaver takes this skillset and wraps a simple to use graphical interface around it so that people who have never programmed a DSP before can now do it in minutes! No cryptic 'C' compilers and linkers, just drag-drop and then upload to the board and you can build and customize your DSP designs like you had been doing it for decades! No need to hire a team of specialized DSP engineers - hire Audioweaver for your next project.

 

 

Detailed Feature Overview

  • Four outstanding functions in one: -
    • Reference Standard 2-Channel DSP Preamplifier for Two-Channel sources
    • Reference Standard 8-Channel DSP Preamplifier/Crossover/Signal Processor for Two-Channel sources
    • Direct-DAC (DSP bypass) mode for Two-Channel sources
    • ES9028 Multi-Channel Direct injection mode via a single interface connector handles: -
      • 8 channel I2S mode
      • Single channel 8 to 1 S/PDIF mux
      • 8 channel DSD mode
      • 8 channel DoP mode
  • ESSTech ES9028-PRO 2nd generation Sabre Professional Audiophile DAC featuring: -
    • Hyperstream II Technology
    • 64-bit accumulator with 32-bit processing
    • Patented Time Domain Jitter Eliminator
    • -120 dB THD + Noise
    • Precision 32-bit volume control on all channels
    • Precision Gain matching between chips
    • Seven preset reconstruction filter types to suit different applications: -
      • Fast roll-off, linear phase filter
      • Slow roll-off, linear phase filter
      • Fast roll-off, minimum phase filter
      • Slow roll-off, minimum phase filter
      • Apodizing, fast roll-off, linear phase filter
      • Hybrid, fast roll-off, minimum phase filter
      • Brick wall filter
  • LM4562 premium audiophile grade opamps used in the post DAC processing
  • Multilayer printed circuit board with dedicated ground and power plane layers
  • Advanced Analog to Digital Converter featuring: -
    • Balanced inputs for higher noise immunity
    • Built-in Programmable Gain Amplifier (PGA)
    • Clocked by a 49.152 MHz low phase noise master clock not derived from a PLL
  • Analog Devices 4th Generation SHARC DSP featuring: -
    • 400 MHz internal clock
    • Harvard architecture with internal 64-bit data paths
    • 40-bit Floating point and 32-bit fixed point processing with 80-bit accumulator
    • 800 MMacs performance and 2.4 Gflops peak performance
    • SIMD instruction set
    • On-chip hardware accelerators
    • 5 Mb of fast on-chip memory and support for 256 Mb of off-chip memory
  • Precision 49.152Mhz low phase noise master reference clock from NDK and clock distribution network with impedance controlled traces
  • Programmable precision master timing generator featuring: -
    • 192, 96, 48 KHz DSP sample rate processing options
    • 49.152 MHz low phase noise master clock not derived from a PLL
    • Strict I2S standards adherence
    • Master or slave modes
  • USB Audio Class 2 interface: -
    • Supports PCM up to 192KHz
    • Supports DSD from DSD64 up to DSD256 or 11.2MHz
    • Galvanically isolated USB Audio interface eliminates injected noise from connecting PC
    • Asynchronous transfer protocol
  • Native onboard DSD Processing in real-time with no software pre-processing required!
    • Supports DSD from DSD64 up to DSD256 (2.8-11.2MHz)
    • No DSP intervention
  • Precision hardware frequency counter accurately displays sample rate and DSD clock rate even for non-standard sample rates
  • Multi-level cascaded regulator design with passive low-Q LC filtering for exceptional noise immunity and regulation,
  • Both Balanced/Unbalanced Audio Outputs available to allow mixing of amps with different input requirements
  • Audiophile grade capacitors where appropriate
  • Premium audiophile grade opamps in the post DAC section
  • Relay muting and protection eliminates turn on thumps and clicks with no effect on sound quality
  • Bespoke custom logic chip design implements various hardware peripherals
  • Perfect-Link dedicated link port featuring: -
    • Ability to piggyback more DSP units for expanding channels or increasing processing capability
    • Proprietary line-lock hardware automatically provides 0-degree phase alignment between multiple boards with no increase in jitter
    • Accurate locking to within one master clock cycle plus cable delay
    • Uses the reference master clock on each board for low phase noise. No PLL re-clocking !
    • Precision gain matching between DAC's on different boards
    • Master and slave DSP boards allows standalone active speakers to be in perfect word sync with each other
  • Amplifier control port typically used in standalone active speaker environments to control amplifier modules
  • Various Audio I/O options and combinations including S/PDIF Coax, AES/EBU, Toslink, I2S, 12V Trigger
  • Advanced user interface console featuring: -
    • Full colored QVGA (320x240 pixels) LCD with backlit display and crisp fast pixel rendered graphics,
    • Stylish full colored bitmap graphics and true-type fonts for that professional appearance,
    • Smooth rotary encoder control for master volume and quick menu changes,
    • Large display of master volume,
    • Seven dimmable status LEDs for real time status reporting namely: -
      • IR receiver activity status
      • DAC Lock status
      • DAC Mute status
      • Plugin active status
      • Line Lock status
    • Full hierarchical intuitive menus and navigation system including: -
      • Tactile buttons for menu navigation
      • Remote control navigation of menus
      • Full color display with context sensitive display
  • Standard Apple Remote Control
  • User Customization of DSP firmware using drag and drop DSP design software
    • Design complex DSP systems in minutes
    • No complex DSP coding necessary
    • Dynamic instantiation so no additional compilers or linkers needed
    • Precision low noise, high performance filters not limited to low sampling rates
    • Field upgradable
  • Field upgradable firmware via USB interface with no unsoldering of chips
  • Balance Control facilitates channel matching with up to 10dB difference between channels
  • DSP plugins for 2/8 channel preamp modes includes: -
    • Soft-Tube emulates the rich sound of many different tube types and operating points
    • Soft-Clipping emulates the clipping characteristics of a tube amp
    • Distortion less precision 32-bit sinewave generator for test purposes
    • Image focuser adjusts stereo image width
  • Typical Applications: -
    • Multi-channel or stereo preamplifier
    • Multi-channel signal processor
    • Multi-way mono or stereo digital crossover
    • Stand-alone stereo DAC
    • Integrated or standalone Active speaker systems
    • Dedicated bass management system
    • Vinyl archiving system

 

 

Board Line up

The board line-up consists of no less than 10 boards including the main DSP processing board. Note that not all of these boards are required depending on your system requirements. All external input-output digital and analog connectors have been assigned to their own boards for maximum flexibility and future upgradability. The total number of boards used in a system will depend on the configuration. For example if only USB-2 Audio is required then this eliminates the Digital Audio IO Interface and Analog Audio Input Interfaces. Alternatively for a standalone active speaker system typically does not require a user interface and L:CD display since this generally is setup once by an external computer.

  • Main DSP Processor Board
  • Digital Audio Interface
  • Amanero Shield
  • Analog Audio Input Combo
  • Multi-Channel Unbalanced Output board
  • Multi-Channel Buffered Balanced Output board
  • Linear Power Supply
  • User Controls
  • LCD Display
  • Perfect-Link Receiver
  • Perfect-Link Transmitter

te

Main DSP Processor Board (Rev B2)

 

 

Feature Highlights

  • DSP capability -
    • 4th Generation Analog Devices Fixed/Floating Point SHARC DSP with SIMD
    • 400 MIPS, 800 MMACS and 2400 M-flops performance
    • 192KHz DSP audio processing rate
    • 32/40 bit floating point format
    • 32 bit fixed point format with 80 bit accumulator
    • IIR filter hardware accelerator
    • FIR filter hardware accelerator
  • Memory -
    • 5 Mbits on-chip fast dual ported memory
    • 256 Mbits 100MHz SDRAM
    • 2 x 16 Mbits Flash RAM
    • 64 Kbits EEPROM
  • DAC -
    • ESSTech ES9028PRO 32 bit Sabre 8 channel Reference DAC
    • 49.152MHz Ultra low phase jitter clock source
  • ADC -
    • Texas Instruments PCM1863 24 bit ADC with PGA
    • 49.152MHz Ultra low phase jitter clock source
  • Digital Audio Input Processing -
    • S/PDIF
    • I2S
    • DSD
    • DoP
  • Digital Audio Output -
    • S/PDIF
  • Audio Inputs -
    • Balanced Stereo Input Channels
  • Audio Outputs -
    • 8 Balanced outputs or 4 balanced stereo channels
    • 8 Unbalanced Outputs for 4 unbalanced stereo channels
  • Digital Audio Processing Modes -
    • Direct-DAC
    • 2 Channel-Preamplifier
    • 8 Channel Preamplifier/Crossover
  • Bit-perfect master volume control
  • Bit-perfect level control on each individual channel
  • Master Reference Clock
    • 49.152MHz Ultra low phase jitter clock and clock distribution network
  • Custom Logic Hardware
    • Precision Reference Master Timing Generator
    • DSD Processing Engine
    • Signal Routing and MUX
    • DSP Glue
    • LCD Driver
    • LCD Pixel Renderer
  • Firmware
    • Firmware upgradable via PC and USB cable
    • APOS DSP operating system
    • Audioweaver framework from DSP Concepts
  • Other
    • Home Theater Bypassing mode including multi channel active speaker setup
    • Native DSD processing in the digital domain without conversion to analog first
    • Board Dimensions:- 226mm x 125mm (Add an extra 10mm to both dimensions to allow for the heatsinks)
   

 

Content 2

Digital Audio IO Combo

This board provides connection to the DSP board from a number of isolated digital audio sources including S/PDIF coaxial,Toslink, S/PDIF AES/EBU and I2S via HDMI. Two isolated S/PDIF outputs are provided by coaxial and Toslink interfaces. There is also a 12Volt Trigger input and output control port.

 

Feature Highlights

  • Digital Inputs -
    • 6 x S/PDIF Inputs -
      • 3 x Isolated COAX BNC Inputs
      • 1 x Isolated AES/EBU XLR Inputs
      • 2 x TOSLINK Optical Inputs
    • 1 x Isolated I2S Input - PSAUDIO standard
    • 1 x Isolated USB Input - Asynchronous USB 2.0 Audio using Amanero Combo 384
  • Digital Outputs -
    • 2 x S/PDIF Outputs -
      • 1 x BNC COAX RCA output
      • 1 x TOSLINK output
  • Digital Formats -
    • Optical S/PDIF - From 32K to 96K
    • Coax S/PDIF - From 32K to 192K
    • AES/EBU - From 32K to 192K
    • USB
      • PCM - From 32K to 192K
      • DSD - 64/128
  • Other Inputs/Outputs -
    • Trigger Input
    • Trigger Output
  • Other
    • Board Dimensions:- 209mm x 63mm (not including protruding connectors)
 

 

Content 3

USB Shield

This adaptor is used to interface the Amanero USB Combo 384 board to the main DSPXO board whilst providing galvanic isolation to eliminated potential source of noise injection from the connecting PC.

 

Feature Highlights

  • Galvanically Isolation eliminates injection of noise from a PC
  • No additional power supplies needed

 

Content

Analog Audio Input Combo**

This board provides the interface from a number of analog audio sources to the Analog-to-Digital converter on the main DSP processing board. All unbalanced sources are converted to balanced signals for maximum noise immunity and compatibility with the differential inputs on the AtoD converter.

**To control the relay switching requires the Digital Audio IO Combo board.

 

Feature Highlights

  • Analog Line Inputs
    • Balanced Stereo Input Channels
      • 1 x XLR
    • Unbalanced Stereo Input Channels
      • 2 x RCA
    • OR
      • 1 x RCA
      • 1 x MM Phono Input with selectable impedance and RIAA curve
        • Switchable Moving Magnet cartridre loading options
          • Resistance 33K,47K,68K
          • Capacitance 50pF-800pF in 50pF increments
  • Other
    • Balanced Microphone input with witchable 48 Volt Phantom Supply
    • Dimensions 209mm x 58mm (not including protruding connectors)
 

4

Con

Multi-Channel Unbalanced Output board

 

Feature Highlights

  • Up to 8 Unbalanced RCA Outputs or 4 stereo channel pairs
  • Independent DC/AC coupling select for each channel
  • Relay Muting
  • Vampire-Wire equivalent Audiophile grade gold plated RCA sockets
  • Board Dimensions 192mm x 47mm (not including protruding connectors)
   

Multi-Channel Buffered Balanced Output board

 

Feature Highlights

  • 8 Balanced Buffered XLR Outputs or 4 stereo channel pairs
  • 300 ohm differential output impedance
  • Independent DC/AC coupling select for each channel
  • Independent switchable gain (0, +3dB, +6dB) for each channel
  • Relay Muting
  • Audiophile grade male XLR connectors
  • Board Dimensions 192mm x 82mm (not including protruding connectors)
   
Multi-Channel Amplifier Direct Balanced Output board
 

Feature Highlights

  • 8 Balanced Buffered XLR Outputs or 4 stereo channel pairs drives amplifier modules directly
  • 4K differential output impedance
  • Independent DC/AC coupling select for each channel
  • Direct Interface to UPXO board
  • Board Dimensions 125mm x 42mm

tent 5

 

Linear Power Supply

 

Feature Highlights

  • Fully Regulated DC power supply
  • Low Noise Encapsulated Toroidal Transformer
  • Selectable Input Voltage Range 120 or 240VAC 50-60Hz
  • Output DC Voltages +12VDC,+15VDC,-15VDC
  • +48VDC Phantom Power Supply
  • Choke-Capacitor output filters
  • Audiophile grade capacitors
  • Fast recovery diodes
  • Board Dimensions 229mm x 68mm
 

Content 6

Conte

User Controls

This board provides a physical user interface to allow the user to interact with the DSP board.

 

Feature Highlights

  • 5 tactile navigation buttons
  • One high quality rotary control
  • 7 status LEDS
  • Infrared receiver
 

LCD Display

 

Feature Highlights

  • Nominal Screen Diameter - 3.2 inches
  • TFT
  • Resolution - 320x240 QVGA
  • Pixel Size - 16 bits
  • Number of colors - 65536
  • Bus Width - 16 bits
  • Board Dimensions 96mm x 62mm
 

nt 7

Content 8

USB Host Adaptor

This adaptor is used to interface the UPXO to a host PC for Audioweaver connections and System setup procedures.

 
Link Port Input Adaptor
 

Feature Highlights

  • High Speed LVDS Differential Receiver
  • HDMI cable interface
  • Perfect Link Protocol
 
Line Port Output Adaptor
 

Feature Highlights

  • High Speed LVDS Differential Transmitter
  • HDMI cable interface
  • Perfect Link Protocol
 
 
 

 

 

 

Source Processing Options

This table explains how different modes handle different source material.

ent 4

External Sample Rate Converter used ?

 
Mode:
Direct-DAC (DSP bypass)
2/8-ch DSP Preamp/Crossover
S/PDIF (Coax/Toslink/AES): N/A Yes
PCM/I2S (via HDMI): N/A Yes
Analog (via ADC): N/A No
PCM/I2S (via USB): N/A Yes

Incoming Audio Rates Supported

 
Mode:
Direct-DAC (DSP bypass)
2/8-ch DSP Preamp/Crossover
S/PDIF (via Coax): 32-192 kHz 32-192 kHz
S/PDIF (via Toslink): 32-96 kHz 32-96 kHz
S/PDIF (via AES-EBU): 32-192 kHz 32-192 kHz
PCM/I2S (via HDMI): 32-192 kHz 32-192 kHz
Analog (via ADC): 192 kHz 192 kHz
PCM/I2S (via USB): 32-192 kHz 32-192 kHz

S/PDIF Decoding Rates

 
Direct-DAC S/PDIF Decoder:
PCM Sample Rate
DAC DIR: 32-96 kHz
SHARC DIR: 32-192 kHz

DSD Decoding Rates

 
DSD Decoder
DSD Sample Rate
Direct DAC: 2.822MHz-11.289MHz
2/8-ch DSP Preamp/Crossover: 2.822MHz-11.289MHz

 

Firmware and Software

Analog-Precision Operating System - APOS

DSP hardware is only as good as the firmware that runs on it. We wrote our own operating system from the ground up in object orientated C++ to take full advantage of the hardware. APOS takes care of all real time audio processing functions as well as all house keeping functions including intuitive context sensitive menu driven user interface, LCD display, Remote Control etc.

Audio Weaver from DSP Concepts

Of course all of this hardware capability would be rendered useless if it could not be customized for the application at hand. To this end we have employed the expertise of DSP Concepts to incorporate Audio Weaver as part of our on board firmware. Audio Weaver from DSP Concepts is an innovative design environment for developing optimized embedded audio software. It embodies years of audio product development experience and enables algorithm and product developers to more quickly and efficiently develop products and technology.

  • PC-Based Development Environment
  • Drag and Drop Signal Processing
  • Over 400 processing Modules
  • Real Time Tuning and Profiling

Audio Weaver differs from other algorithm design tools in that is it focused specifically on audio and geared toward the needs of product developers rather than researchers. Audio Weaver automates many of the mundane tasks associated with developing embedded products and allows the designer to focus on adding sophisticated functionality or reducing time-to-market.

 

Ultimate-Preamplifer Control-Panel

This sofware app runs on the host PC and communicates via the same USB interface that Audioweaver uses. It provides a number of services such as formware upgrading, LCD screen capture, virtual user front panel etc.

 

 

 

 

 

 

 

 

 

 

Applications

  • High quality multi-channel or stereo preamplifier
  • High quality multi-channel signal processor
  • High quality multi-way mono or stereo digital crossover
  • High quality stand-alone stereo DAC
  • High quality integrated or standalone Active speaker systems

Why the Ultimate Preamplifer is not just another audio DSP board

When we started sketching out plans for the Ultimate Preamp we did not set out to create yet another cookie cutter style DSP board built to the lowest cost using the cheapest possible components. This has been done to death over the years with many low cost offerings now available. It seems that the latest craze with DSP is who can build the cheapest board just so long as it has a DSP onboard then nothing else is important !

We wanted to stand out from the pack and create a no-compromise exceptional product right from the start rather than be another me-to mediocre DSP product that people soon want to upgrade. First and foremost the Ultimate Preamplifier is just that, a hi-end no holds barred preamplifer that just happens to contain on board DSP processing and a premium quality DAC - the same DAC that is also used in many hi-end stand-alone DAC's and preamps that can sell for $10,000 or more. What the Ultimate-Preamplifier is NOT - is another cheap DSP board built to the lowest possible spec and price nor is the Ultimate Preamplifier just a slave DSP board with no means for user interaction and control. The following table compares the features between the Ultimate-Preamplifier and your typical DSP board offering.

Feature Ultimate Preamp Typical Low Cost DSP Board
Floating Point DSP
192KHz processing
Premium Quality Audiophile DAC's
Premium Quality Audiophile Opamps
Low Phase Noise Master Clock
Low Noise Regulators
Multi-Level Regulation
Bipolar power supply
Bit Perfect Volume Control
Native DSD Capabilty
USB Audio Class 2
Isolated USB Audio interface
Unbalanced audio outputs
Balanced Audio Outputs
DC coupled Audio Outputs
Premium Quality Audio Conectors
Pop, click, thump supression
Relay Muting
Word synchronize multiple boards
Custom DSP designs
Vendor independent custom DSP designs
LCD Display
Front Panel User Controls
Context sensitive menu system

 

 

 


Last Updated November 7, 2017