Sound with DAC is great!

[ChKK1963]

I received the Raspiaudio+ V2 DAC today - now MiniDexed sounds really great, no noise or distortion, latency is great as well!

Attached this on top of a GPIO extension hat to be able to easily add the display/encoder once they arrive ...

[probonopd]

Does it have a PCM5122 chip? If yes, then it would be great if you could test #133 to see whether it breaks your DAC (I hope not). Once you confirm that it is still working, I could merge it.

[diysynth]

I guess this is the right place to ask if this DAC will work with minidexed: https://www.berrybase.de/en/raspberry-pi/raspberry-pi-computer/gpio-hats-phats/audio/iqaudio-dac-43

At least it has the PCM5122 DAC that is mandatory.

[probonopd]

PCM5122... Then it should probably work.

[WilliamKWusik]

What is the latency in MS? Thanks. :-)

[WilliamKWusik]

From your test, don't forget to subtract the latency of your audio device. That's the one adding up to near 12 ms latency.

[WilliamKWusik]

Ahhh, at 48khz samplerate, 128 samples is 2.6 ms.

[probonopd]

Should we change

MiniDexed/src/config.h

Line 83 in bba0c93

static const unsigned MaxChunkSize = 4096;

to default to 128?

[diyelectromusic]

We shouldn't touch the maximum chunk size in my view. The default chunk size used is either 1024 or 256: https://github.com/probonopd/MiniDexed/blob/main/src/config.cpp#L66

But the actual chunk size can already be set in miinidexed.ini: https://github.com/probonopd/MiniDexed/blob/main/src/minidexed.ini#L10

But there will be other considerations relating to how much audio is processed per IO scan and the scheduling between cores and stuff like that, so it is better to leave it as something for people to experiment with if their situation and understand allows them to, but leave some usable defaults (as we have right now).

Kevin

[Banana71]

Should we change

MiniDexed/src/config.h

Line 83 in bba0c93

static const unsigned MaxChunkSize = 4096;

to default to 128?

I don't see any need to limit the maximum chunk size to 128. Or do you want to set the ChuckSize=128 as the default value in the minidexed.ini? I haven't had any problems with a ChuckSize=128 so far, but I've only ever used one type of DAC (GY-PCM5102) and can't comment on other models or the PWM mode.
Perhaps the wiki entries on chunk size and sample rate should be revised.

Does the sample rate still have a direct influence on the reverb time (size), or has this bug been fixed?