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Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project
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Old 25th April 2019, 10:04 AM   #1211
bkdog is offline bkdog
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dch53, did you follow the procedure here?
http://www.analog-precision.com/Down...ate_Preamp.pdf
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Old 25th April 2019, 10:42 AM   #1212
Tranquility Bass is offline Tranquility Bass  Australia
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Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project
Quote:
Originally Posted by dch53 View Post
I've had my Ultimate Preamp running unchanged for 18 months.

When I first received it I customised the preconfigured 3-way crossover script from the download page and saved it to the on-board flash memory.

Now I want to temporarily try some HF amps that require the HF level to be reduced.

I made the level change and ran the script on the Ultimate Preamp on-board memory. CPU shows as 0.41%. All good.

When I attempt to play something with JRiver I get

Playback could not be started on the output 'ASIO' using the format '44.1kHz 2ch'.

If I now close Audio Weaver so I can play something, does the script continue to run on the Ultimate Preamp on-board memory?

Thanks.
Make sure you have the drivers installed for the Amanero board if you are running Windows. The Amanero board is powered from the PC so it is always running even if the Preamp is turned off. If you want your Audioweaver script to always run then you need to save it to on-board flash as outlined in the document by bkdog

cheers
david
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Old 25th April 2019, 12:47 PM   #1213
Tranquility Bass is offline Tranquility Bass  Australia
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Also in Jriver make sure you select the right sound device. ie Tools -> Options -> Audio Device -> Combo 384 ASIO 1.03

cheers
david
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Old 25th April 2019, 01:00 PM   #1214
dch53 is offline dch53  Australia
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Quote:
Originally Posted by Tranquility Bass View Post
Make sure you have the drivers installed for the Amanero board if you are running Windows. The Amanero board is powered from the PC so it is always running even if the Preamp is turned off. If you want your Audioweaver script to always run then you need to save it to on-board flash as outlined in the document by bkdog

cheers
david
Thanks David.

It's 18 months since I set up my Ultimate Preamp and I haven't given it a thought since then so what I did at the time is a bit hazy.

I have the drivers installed for the Amanero board (well "Combo384" anyway). That's how JRiver interfaces with the Ultimate Preamp.

I'm using "Uploading an AudioWeaver design to The Ultimate Preamplifier". Is that the document by bkdog?

I've just re-read the document from the beginning.

I already have UPCP installed but it won't connect. I assume it must have done 18 months ago.

The instructions say "Once Audioweaver Server is running it will default to native PC mode so you need to select the right connection (RS-232) to communicate with the Ultimate-Preamp hardware from the menu. Ie [Target] → [Change Connection] → [RS232] as shown in the following screen grab."

When I run Audioweaver it does run in native PC mode but when I try to change it to RS232 (COM1, COM2 or COM3), it won't connect.

Anyway...

When I run the script in the on-board memory that appears to work because it shows CPU activity as depicted in the instructions.

I was hoping not to load the script into on-board flash because it's only temporary and I don't want to disturb the normal operation.

In that document it says "This script will run on the Ultimate-Preamp on-board memory so long as the Ultimate-Preamp is not switched off. "

My plan was to let the script to run in the on-board memory until my testing is finished.

Presumably, both AudioWeaver and JRiver can't use the interface at the same time.

But when I close AudioWeaver it appears that the script running in the on-board memory is no longer running. At least, if I restart AudioWeaver it shows 0% CPU activity in the Ultimate Preamp so I assume it's no longer running.
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File Type: png Audioweaver.png (386.3 KB, 199 views)
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Old 25th April 2019, 01:19 PM   #1215
Tranquility Bass is offline Tranquility Bass  Australia
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If it's not connecting then make sure you have a USB cable connected to the service port on the back of the Preamp. If you don't have an extra USB cable you can just temporarily swap the cable from the Amanero USB port to the service port and then swap back once everything has been configured and you are ready to play some music.

If it's still not connecting check this in the Windows device manager. Then you may have to reinstall the FTDI driver again. ie go Start -> Ultimate Preamplifier -> USB Driver -> Win-7 USB Driver

PS If you want to configure Audio Weaver and play music at the same time then you will need both USB ports connected

cheers
david
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Old 26th April 2019, 04:48 AM   #1216
dch53 is offline dch53  Australia
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Quote:
Originally Posted by Tranquility Bass View Post
If it's not connecting then make sure you have a USB cable connected to the service port on the back of the Preamp.

If you want to configure Audio Weaver and play music at the same time then you will need both USB ports connected
Thanks very much Dave. With a second USB cable connected to the service port I was able to connect using RS232 and COM4. I can see the scripts I loaded into the on-board flash memory 18 months ago running.

Audio Weaver Server.png

With the 3-way xover I’m using the bass, mid-bass and mid outputs on the Ultimate Preamp.

I loaded the 3-way xover and reduced the high level from -1.8dB to -12dB.

3-way xover.png

I click Run and the upload process appears to have been successful.

However, I’m not hearing any difference.

If I click “Halt” all activity in the Server stops and there’s no playback so I assume the modified script is running in the on-board memory.

Any suggestions please?
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Old 26th April 2019, 05:10 AM   #1217
Tranquility Bass is offline Tranquility Bass  Australia
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Quote:
Originally Posted by dch53 View Post
Thanks very much Dave. With a second USB cable connected to the service port I was able to connect using RS232 and COM4. I can see the scripts I loaded into the on-board flash memory 18 months ago running.

Attachment 752334

With the 3-way xover I’m using the bass, mid-bass and mid outputs on the Ultimate Preamp.

I loaded the 3-way xover and reduced the high level from -1.8dB to -12dB.

Attachment 752335

I click Run and the upload process appears to have been successful.

However, I’m not hearing any difference.

If I click “Halt” all activity in the Server stops and there’s no playback so I assume the modified script is running in the on-board memory.

Any suggestions please?
Are you getting outputs from all 3 channel pairs ?

cheers
david
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Old 27th April 2019, 04:15 AM   #1218
dch53 is offline dch53  Australia
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Quote:
Originally Posted by Tranquility Bass View Post
Are you getting outputs from all 3 channel pairs ?
david

Yes.

I bought my unit with both balanced and unbalanced outputs.

I should be able to use a mix of balanced and unbalanced outputs shouldn't I?

All my amps have unbalanced inputs but the ones I'm testing have balanced.

Unfortunately, I'm going to have to put this on the back-burner for now. I'll keep you posted.

Thanks again, Dave.
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Old 27th April 2019, 04:53 AM   #1219
Tranquility Bass is offline Tranquility Bass  Australia
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Quote:
Originally Posted by dch53 View Post
Yes.

I bought my unit with both balanced and unbalanced outputs.

I should be able to use a mix of balanced and unbalanced outputs shouldn't I?

All my amps have unbalanced inputs but the ones I'm testing have balanced.

Unfortunately, I'm going to have to put this on the back-burner for now. I'll keep you posted.

Thanks again, Dave.
Yes you can use a mixture of unbalanced and balanced outputs on the preamp but be aware due to way I layed out the pcb at the time the unbalanced outputs are inverted wrt to the balanced outputs so you will need to reverse the speaker connections on the amps for the unbalanced speaker connections to maintain the correct phase

cheers
david
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Old 28th April 2019, 03:26 AM   #1220
dch53 is offline dch53  Australia
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Quote:
Originally Posted by Tranquility Bass View Post
Yes you can use a mixture of unbalanced and balanced outputs on the preamp but be aware due to way I layed out the pcb at the time the unbalanced outputs are inverted wrt to the balanced outputs so you will need to reverse the speaker connections on the amps for the unbalanced speaker connections to maintain the correct phase

cheers
david
Thanks again for your help David. Bit embarrassing really. I misunderstood how the xover component worked in Audio Weaver. Expecting to have HF at the top and LF at the bottom but it's the other way around.

All good now.
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