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Topics - Tranquility Bass

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One astute reader contacted us recently and asked why there was nothing on stereonet about our products as he was interested to find out more and get some user feedback but told us that the forum search always produced no results when searching for “Analog-Precision” so we had to investigate this for ourselves. For those not familiar with stereonet it is nothing more than a glorified advertising platform masquerading as some kind of ‘hifi community’ with the members being used as its captive audience but it is anything but a hifi community with its draconian style of censorship and restrictions unless you are willing to pay the $$$ to have some of them removed :(

Anyway check it out. It seems the reader was onto something here with a search for 'Analog-Precision' yielding absolutely nothing. Maybe I have got the spelling wrong but I checked numerous times and each time it yields 0 results. So the plot thickens ;)



Perhaps it is not returning a result because there is nothing to find ? I told the reader who contacted me that they probably didn’t find anything on stereonet because we have been blacklisted and the only thread that was specific to the Preamp has been completely removed by the owner of that forum, however I had the foresight to grab a copy of the thread before it disappeared and have provided a link at the end of this post where you can download it. The reason why this happened is that I believe the owner of that forum and one of its paying sponsors tried to undermine our business by attempting to siphon away prospective customers from us at a critical time of the pre-order for our 2nd generation Preamps. When I complained about it on this forum I received a very abrupt and threating PM from the owner of stereonet requesting that I remove a couple of statements which I refused to do and the rest is history ! Neither statements had anything to do with the underlying issue but more about the so called reputation of the owner of stereonet. 

You will also notice that we have not been added to their list of Australia made product websites even though we probably make one of the most sophisticated and technically advanced consumer audio products in Australia at the moment ! Apparently our website was added only for a very short period of time before it was pulled again ! Check it out analog-precision is missing in action !



Perhaps they don’t think we are worthy of any addition because in the owners own words we are just a bunch of ‘hacks’ struggling to get something to market whilst the owner of stereonet was hatching up plans with one of its paying sponsors to steal away prospective customers from us at a critical time ! And I am glad he agreed that our product works because I don't think he has ever created anything himself or understands how difficult it is !



Having said that, there are still some remnants and old posts that refer to our product or website on stereonet but we had to dig hard just to find one of them as the search engine has been crippled for anything to do with us !

https://www.stereo.net.au/forums/topic/310890-generic-dsp/?tab=comments#comment-4535353



To prove the forum search is not broken let’s try some other search terms such as ‘minidsp’ which I believe is not a sponsor but gets plenty of free plugs every day and all day long. Go figure ! All 22 pages of search results which reference this particular brand !! Not bad for a vendor that doesn't pay a single cent of sponsorship !



For what it is worth I had the foresight to take a copy of the only thread about the Ultimate-Preamplifier Mk-1 before it had been completely removed and have made it available below as a pdf download below including the owner requesting that I apologize to him which he later retracted from that thread before he removed the thread altogether! I won’t be apologizing to him for anything as he has a number of apologies to make to others before he seeks redemption for his own misdeeds.  Funnily enough I wasn’t banned out right although I can still log on but not post or access the PM’s but this was a while ago and I haven’t checked since !!



Download link to deleted thread below:

2
Firmware Updates / Firmware Update: TBA
« on: May 13, 2021, 04:16:04 AM »
Firmware Version: TBA
Firmware release date: TBA
Tested On: UP2, UPP
Status: Testing
Description:
Added standby mode to Preamps configured as Slave Devices in Master/Slave setup.
For the microphone input converted single left channel to left + right channel for measurement purposes.
For the UPP fixed problem switching from 2-ch Preamp mode to Multi-Channel Direct mode and back again.
Matched level on 2-Ch Preamp mode which was 6dB lower than 2-Ch Direct DAC mode when playing DSD files via the 2-Ch USB interface.
For the RC testing menu have redefined the correct data fields to match the data packets.

Recommendations: To avoid unnecessary side effects after updating the firmware it is recommended to do a factory reset to initialize the non volatile memory to a known state. You should note the current settings before doing this as these will be cleared. This can be accessed from the front panel ie [Main Menu] -> [Setup] -> [Setup User] -> [Factory Default / Push Center Button]

References:

How to upload firmware updates to the Ultimate Preamplifier

This firmware download link below:






3
This thread is about running DIRAC DRC on the Ultimate-Preamplifier Plus (UPP) so please feel free to add your experiences. With the help of one of my clients the generous  folks at DIRAC have kindly offered me a license to run DIRAC which I greatly appreciate. I'm no expert on Dirac so here is my experience with it to date. One of the things you will find is that once all of the hardware works with each other the process of correcting a loudspeaker is really quite streamlined and doesn't require any additional specialist help like some of the other DRC solutions. I have managed to get a lot of DIRAC working with the UPP but are still having trouble getting the audio stream from the UPP that represents the Preamplifier output into the DIRAC live stream application so any advice welcome on this front and for those attempting to use it with an Apple platform.

Now why would you want to run Dirac with the Preamp instead of something like Jriver on a PC etc ? For the same reason you would want to listen to your favourite CD player, vinyl playback on a turntable, a tuner, tape deck etc etc which can't be done on a PC alone and this is why the Ultimate Preamplifier Plus is unique because you now have the ability to apply this room correction to any source that is connected to the Preamp and not just limited to streaming music from a PC ;)

Dirac Website: https://www.dirac.com/hd-sound-loudspeakers

More References:

FAQ

How it works

Dirac installation guide

Quick Start Guide - English

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Firmware Updates / Firmware Update: 210513-1335
« on: May 13, 2021, 04:16:04 AM »
Firmware Version: 210513-1335
Firmware release date: 13-May-2021
Tested On: UP2, UPP
Description: This update addresses differences in Apple remote controls as there appears to be two types of remote with slightly different codes and some wouldn't work depending on which one you purchased which wasn't clear as they both looked identical. This has now been fixed in this release so the UP should now respond to both types.

We have also changed the "Setup S/PDIF Output" menu and have removed the loop through function and added a sample rate output selection because some external DAC's cannot run at the native DSP sample rate of 192kHz nor can the Toslink output of the preamp run at more than 96kHz.

References:

How to upload firmware updates to the Ultimate Preamplifier

How to implement a stereo 5-way crossover with the Ultimate-Preamplifier

This firmware download link below:






5
Audioweaver / 8-Channel Stereo Pass through
« on: May 25, 2021, 07:57:52 AM »
This script is used for testing the DAC’s and directly passes audio data from the left channel to the all of the odd channels (Ch 1,3,5,7) and from the right channel to the all of the even channels (Ch 2,4,6,8).

WARNING ! It is recommended not to have speakers connected when using this mode otherwise it may cause damage to the upper range drivers if they are driven with wide band or low frequency content.


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Audioweaver / 4-way Stereo Crossover
« on: May 25, 2021, 07:51:41 AM »
This script uses Audio-Weaver’s built in High-Performance Linkwitz-Riley crossover module to implement a stereo 4-way crossover. Crossover Levels and frequencies can be customized to arbitrary values. Crossover slopes can be adjusted from 1st to 10th order slopes.


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Audioweaver / 3-way Stereo Crossover
« on: May 25, 2021, 07:49:08 AM »
This script uses Audio-Weaver’s built in High-Performance Linkwitz-Riley crossover module to implement a stereo 3-way crosover. Crossover Levels and frequencies can be customized to arbitrary values. Crossover slopes can be adjusted from 1st to 10th order slopes.


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Audioweaver / 2-way Stereo Crossover
« on: May 25, 2021, 07:45:11 AM »
This script uses Audio-Weaver’s built in High-Performance Linkwitz-Riley crossover module to implement a stereo 2-way crossover. Crossover Levels and frequencies can be customized to arbitrary values. Crossover slopes can be adjusted from 1st to 10th order slopes.


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For more information on this topic please download the following pdf document:-

Extending The DSP Capability of the Ultimate Preamplifier PLUS


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Firmware Updates / Firmware Update: 181009-1539
« on: May 13, 2021, 04:16:04 AM »
Firmware Version: 181009-1539
Firmware release date: 08-Jan-2018
Tested On: UP1
Description:

References:

How to upload firmware updates to the Ultimate Preamplifier

This firmware download link below:






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Please refer to the following documentation for full instructions on how to upload firmware updates to the Ultimate Preamplifier

How to upload firmware updates to the Ultimate Preamplifier

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Wiki and Q&A / Using Jriver with the Ultimate-Preamplifier
« on: May 04, 2021, 10:38:32 AM »
Jriver provides direct hardware support for the 2-channel Amanero USB adaptor used in the Ultimate Preamplifier 2/+ so some setup in Jriver is necessary to take full advantage of the Ultimate-Preamplifier. Here is the setup I used in Jriver version 27. Earlier versions of Jriver will be very similar.

Step 1. Make sure you have installed the drivers for the Amanero device on your PC and make sure your PC is connected to the USB audio 2-Channel input on the back of the preamp. Select "Combo384 ASIO" from the Audio Device menu as below:-



Step 2. Set Device settings as follows



Step 3. Since the preamp can only handle a maximum of 192 kHz sample rate you can down convert the higher formats using integer fraction sampling rates as below:-



Step 4. Both the 2-ch Preamp and 2-ch Direct DAC modes on the Preamp use hardware DSD (not DoP) so set this as follows:-




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For more information on this topic please download the following pdf document:-

Not all Balanced Inputs are created equally or How not to design a power amplifier !

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Wiki and Q&A / DC Coupling And Offset Voltage Issues
« on: May 03, 2021, 05:31:45 AM »
For more information on this topic please download the following pdf document:-

  DC Coupling And Offset Voltage Issues

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For more information on this topic please download the following pdf document:-

  Eliminating Intersample overs in the Ultimate-Preamplifier using Intersample Over Guards

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