mono conversions have "static"

[kurt]

Version 9a creates "digital static" at the beginning of audio (e.g. MP3, MP2, WAV) when it is converted to mono (44.100 kHz, 16 bit, mono WAV). The "static" seems to go away after a minute or so.

I re-installed v7.0 and the problem went away. Spoon, your notes say version 9 has an improved procedure when merging stereo tracks to mono. (Mono tracks were way too hot.) Is this static bug related to that?

Kurt @ KJOL

[Spoon]

It could easily be.

I have just run this test - took a monkey audio file converted to 44Khz Stereo 16bit Wave.

Then converted said Wave file to a 44Khz mono 16bit wave - my 'golden ears' might be crap but it sounds ok for a mono file.

Can you send one of the mp3 files that has problems going mono to dbpoweramp@dbpoweramp.com

[Spoon]

I have tried the samples you sent - as always...the conversion went fine for me converting to a mono wave file.

I noticed something though - I think the Mp3 decoder is not working as it should - the mono wave file you sent me was smaller than the one I created - your Tesh.wav = 5,286,966 bytes my Tesh.wav = 5,294,638 bytes

I think the bits missing from yours is causing the static. Did you install the test 'Mpeg123 decoder?' - one thing to check - look in c:\program files\dbpoweramp\multiplayer\input\mp3.dll - do a properties on it and it should be File Version: 4.0.0.51 and Description: Mp3

If it is File Version: 4.0.0.60 and description: Mp3 using mpg123

then I might have something in the standard dMC install that shouldn't be there...

[kurt]

correct mp3.dll

Spoon,

The version of mp3.dll that I installed for v9a is indeed 4.0.0.51. I tried replacing it with 4.0.0.38 from v7 but the problems persist unless I reinstall v7 in its entirety.

Kurt

[Spoon]

Try converting the file to a 16 bit stereo wave file, it will tell me if it is the mp3 decoder.

[kurt]

Stereo 16-bit wav files sound fine.

[Spoon]

And then try converting that stereo wave file to a mono wave file.