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  1. #1
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    High pitch distorted sound when 32/192 files are played.

    Greeting to all members,

    I am using Raspberry Pi 4 as a PiCorePlayer player.

    Tried a couple of dac hats and a Topping D10s and I couldn't manage to get them play 32/92 files without this scratching noise on top of the sound.

    Audio output set to USB Audio, Output setting set as hw:CARD=D10,DEV=0 and ALSA Setting 80:4::1. (tried also 120:4::1)

    Is there any other setting or a way to get this problem solved?

    Thanks in advance for your help.

  2. #2
    Senior Member
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    Feb 2011
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    Cheshire, UK
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    What happens if you convert the files to 24/192? I suspect they will play perfectly ie the files themselves are probably the problem
    Jim
    https://jukeradio.double6.net


    VB2.4 storage QNAP TS419p (NFS)
    Living Room Joggler & Pi4/Khadas -> Onkyo TXNR686 -> Celestion F20s
    Office Joggler & Pi3 -> Denon RCD N8 -> Celestion F10s
    Dining Room SB Radio
    Bedroom (Bedside) Pi Zero+DAC ->ToppingTP21 ->AKG Headphones
    Bedroom (TV) & Bathroom SB Touch ->Denon AVR ->Mordaunt Short M10s + Kef ceiling speakers
    Guest Room Joggler > Topping Amp -> Wharfedale Modus Cubes

  3. #3
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    Quote Originally Posted by d6jg View Post
    What happens if you convert the files to 24/192? I suspect they will play perfectly ie the files themselves are probably the problem
    Thanks for your input.
    But the files have no problem at all as I can play them using JRiver and LibreElec with my Topping D10s.
    I wonder whether there is an ALSA setting or similar to solve the problem.

  4. #4
    Senior Member
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    Quote Originally Posted by Naass View Post
    Thanks for your input.
    But the files have no problem at all as I can play them using JRiver and LibreElec with my Topping D10s.
    I wonder whether there is an ALSA setting or similar to solve the problem.
    Whether they play or JRiver etc is irrelevant. I'm not sure LMS is capable of handling 32bit files at all - they have only become prevalent in the last couple of years - leaving aside the question of whether there is any audible difference given the limitations of the human ear. If you do convert them to 24bit do they play on LMS?

    On a number of occasions preople have reported purchased downloaded HiRes files not playing correctly on LMS but playing perfectly Ok on VLC etc.
    The fix is usually to re-encode them to the same format using something like dbPoweramp - it sounds illogical but you take a non playing 24/192 file and then re-encode it as 24/192 and its fixed.
    Jim
    https://jukeradio.double6.net


    VB2.4 storage QNAP TS419p (NFS)
    Living Room Joggler & Pi4/Khadas -> Onkyo TXNR686 -> Celestion F20s
    Office Joggler & Pi3 -> Denon RCD N8 -> Celestion F10s
    Dining Room SB Radio
    Bedroom (Bedside) Pi Zero+DAC ->ToppingTP21 ->AKG Headphones
    Bedroom (TV) & Bathroom SB Touch ->Denon AVR ->Mordaunt Short M10s + Kef ceiling speakers
    Guest Room Joggler > Topping Amp -> Wharfedale Modus Cubes

  5. #5
    Senior Member
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    Jan 2010
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    Hertfordshire
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    Quote Originally Posted by Naass View Post
    Thanks for your input.
    But the files have no problem at all as I can play them using JRiver and LibreElec with my Topping D10s.
    I wonder whether there is an ALSA setting or similar to solve the problem.
    What type of files are these? I just tried converting to 32 bit FLAC and it wasn't possible.

    Sent from my Pixel 3a using Tapatalk

  6. #6
    Junior Member
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    Mar 2021
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    Quote Originally Posted by slartibartfast View Post
    What type of files are these? I just tried converting to 32 bit FLAC and it wasn't possible.

    Sent from my Pixel 3a using Tapatalk
    The format is .wav.
    I tried to convert one of the files to FLAC and ALAC and both failed.
    But I could covert it to WAVE using dbpoweramp and it worked and could be played with LMS.

    Anyway, I thought there was a setting to be done on LMS to play such files, but it seems that LMS doesn't have this cabapility yet.
    So, I'll leave it here and for thos files I will use JRiver as I always did.

    Thanks to you and all the forumers for your help.

    Naass

  7. #7
    Senior Member
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    Quote Originally Posted by Naass View Post
    The format is .wav.
    I tried to convert one of the files to FLAC and ALAC and both failed.
    But I could covert it to WAVE using dbpoweramp and it worked and could be played with LMS.

    Anyway, I thought there was a setting to be done on LMS to play such files, but it seems that LMS doesn't have this cabapility yet.
    So, I'll leave it here and for thos files I will use JRiver as I always did.

    Thanks to you and all the forumers for your help.

    Naass
    OK are they 32 bit integer or 32 bit float? I just converted a track to both formats and the integer version sound fine but the float version sounded dreadful.

    Sent from my Pixel 3a using Tapatalk

  8. #8
    Junior Member
    Join Date
    Mar 2021
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    27
    Quote Originally Posted by slartibartfast View Post
    OK are they 32 bit integer or 32 bit float? I just converted a track to both formats and the integer version sound fine but the float version sounded dreadful.

    Sent from my Pixel 3a using Tapatalk
    I can't tell if it is integer of float!
    I had a good listen on the 32/192 vs the down-converted to 24/192 and found they're quite close in sound quality.

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