Maximum samplerate

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Maximum samplerate

Postby hansh64 » 16 Jun 2017, 19:56

Hi all,

I need some advice. My brother is using a RPI2 with DIgi+ board connected to an Arcam receiver using a coaxial S/PDIF cable. This work fine with FLAC files up to 24/96.

However, he has some files in his collection with bitdepth/samplerate of 24/176.4 and 24/192. These files do play on rune but produce no sound due to the limitations of the Arcam's DAC.

Is there a way to downsample to max 24/96 (with 24/192 files) or 24/88.2 (with 24/176.4 files) while playing somewhere in the RuneAudio UI? Making changes in mpd.conf are reverted automatically by RA.

Thanks for your help!

Hans.
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Re: Maximum samplerate

Postby hondagx35 » 16 Jun 2017, 22:12

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Re: Maximum samplerate

Postby hansh64 » 17 Jun 2017, 19:29

Hi Frank,

Thanks again for your quick answer and I can tell you that it works!

However, I have a couple of questions:
1. The post you provided does indeed add
Code: Select all
format  "96000:*:*"
in the audio_output settings for the Digi+. I am just wondering if mpd uses the "samplerate_converter" setting and by what value? I actually would like the "Best Sinc Interpolator" (or integer "0") value to be used if possible.
2. Would it be possible not to upsample to 96000 if the file is 44.1 or 88.2 kbps sample rate?
3. Would it be possible to downsample a 176.4 kbps file to 88.2?

Thanks in advance!

Greetz,
Hans.
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Posts: 31
Joined: 03 Jun 2015, 15:48

Re: Maximum samplerate

Postby hondagx35 » 18 Jun 2017, 17:56

Hi Hans,

I am just wondering if mpd uses the "samplerate_converter" setting and by what value? I actually would like the "Best Sinc Interpolator" (or integer "0") value to be used if possible.

Rune uses the default "Fastest Sinc Interpolator".
You can change this with:
Code: Select all
redis-cli hset mpdconf samplerate_converter 0


2. Would it be possible not to upsample to 96000 if the file is 44.1 or 88.2 kbps sample rate?
3. Would it be possible to downsample a 176.4 kbps file to 88.2?

I never checked this, because all my DACs can play up to 192 (384).
Please search the net and if you find something I will help you to implement it.

Frank
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