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Raspberry Pi with Piano2.1 DAC DSP and Volumio2
Raspberry Pi with Piano2.1 DAC DSP and Volumio2
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Old 7th December 2018, 01:51 PM   #101
DonVK is online now DonVK  Canada
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^ That's unfortunate. I'll have to check that on volumio when I do some measurements on the standard firmware.

In the meantime you can try the firmware from post #91. It uses a less aggressive BW2 instead of LR4 for DAC#0. If your fronts have a sealed woofer it will match slopes much better to the subwoofer.

Tonight, I'll post a firmware pkg that is pass through for DAC#0 (no HP filter).

Last edited by DonVK; 7th December 2018 at 01:52 PM. Reason: grammer
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Old 7th December 2018, 06:36 PM   #102
DonVK is online now DonVK  Canada
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Default Firmware - DAC0 Front (L&R) pass thru, DAC1 sub LP LRx

@komerdoor - this is for your evaluation. You can always mix & match with other firmware in this thread.
Attached Images
File Type: jpg Piano Pinout 2.2-5.jpg (159.3 KB, 62 views)
File Type: jpg DAC0 front pass through.jpg (271.5 KB, 56 views)
File Type: jpg DAC1 sub LP LR2 LR4.jpg (311.9 KB, 57 views)
Attached Files
File Type: zip TI PurePath Projs.zip (141.1 KB, 0 views)
File Type: zip 2.2-5 firmware.zip (144.2 KB, 3 views)
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Old 8th December 2018, 02:38 AM   #103
komerdoor is offline komerdoor  Netherlands
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Quote:
Originally Posted by DonVK View Post
@komerdoor - this is for your evaluation. You can always mix & match with other firmware in this thread.

Thank you very much, I will try it out later.
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Old 8th December 2018, 09:19 AM   #104
komerdoor is offline komerdoor  Netherlands
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Ok tried it. I do not get any sound. Both firmware binaries loaded fine, so I am not sure if this is because I use the Allo Volt. I replaced the 2.2 firmware and switched to 2.2 mode. It works again after I restore the original firmware.

Last edited by komerdoor; 8th December 2018 at 09:36 AM.
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Old 8th December 2018, 04:59 PM   #105
DonVK is online now DonVK  Canada
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^ I just downloaded and tried 2.2-5 and it works fine via Volumio. It's unlikely that the amplifier shield is causing the problem. It's more likely a problem with the copy, or permissions, or "sticky" configurations.

I've put screenshots of the directory permissions and contents of the 2.2 directory after I copied the 2.2-5 firmware into it. Note the file sizes which are related to the firmware build.

With Volumio, 1) I copy the firmware files over to the 2.2 directory, 2) select the mode I want, 3) reboot the system. I can see from dmesg that the old configuration (sticky) is initially loaded then it's overwritten with the new configuration.
Attached Images
File Type: jpg piano firmware permissions.jpg (58.8 KB, 42 views)
File Type: jpg firmware piano 2.2-5 listing.jpg (141.4 KB, 44 views)
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Old Yesterday, 02:34 AM   #106
komerdoor is offline komerdoor  Netherlands
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Quote:
Originally Posted by DonVK View Post
^ I just downloaded and tried 2.2-5 and it works fine via Volumio. It's unlikely that the amplifier shield is causing the problem. It's more likely a problem with the copy, or permissions, or "sticky" configurations.

I've put screenshots of the directory permissions and contents of the 2.2 directory after I copied the 2.2-5 firmware into it. Note the file sizes which are related to the firmware build.

With Volumio, 1) I copy the firmware files over to the 2.2 directory, 2) select the mode I want, 3) reboot the system. I can see from dmesg that the old configuration (sticky) is initially loaded then it's overwritten with the new configuration.

Thank you. It works, but only if I set my MPD settings to the following:

audio_output_format "192000:32:2"


Instead of:

audio_output_format "384000:32:2"


Kernel log of firmware being loaded when I play a song using the 384000 setting in MPD:


Code:
[  134.775288] pcm512x 1-004c: Dsp Firmware File Name: allo/piano/2.2/allo-piano-dsp-192000-60-0.bin
[  134.987251] pcm512x 1-004d: Dsp Firmware File Name: allo/piano/2.2/allo-piano-dsp-192000-60-1.bin
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Old Yesterday, 02:48 AM   #107
DonVK is online now DonVK  Canada
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That makes sense. If you look at the DSP bin files the highest rate supported is 192K. Good to see you have a solution.
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Old Yesterday, 03:03 AM   #108
komerdoor is offline komerdoor  Netherlands
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Quote:
Originally Posted by DonVK View Post
That makes sense. If you look at the DSP bin files the highest rate supported is 192K. Good to see you have a solution.

Ah I never knew to be honest, but I just read the specs . Sorry for bothering you with all this and thanks again for the firmware binaries. Will play with it some more tomorrow.
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