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Autotranscode produces artifacts

Posted: Tue May 07, 2019 7:07 am
by beaches09
mmw 4.124.1883, mma 1.3.5.0856, galaxy s9, android 9. using m4a quality 50, 60. songs output around 256kbps.

Sync went over a very strong wifi connection, and I only used 6 of 8 pc threads for encoding.

Many songs have static stratch artifacts that are not in the original FLAC files. Like a scratched record sound.

Is there a way around this? Thanks

Also, is there a way to import a different aac encoder? Which one do you guys use?

Thanks

Re: Autotranscode produces artifacts

Posted: Wed May 08, 2019 7:21 pm
by Peke
Hi,
I am not being able to replicate, what formats are FLAC files and do you have Volume leveling enabled on Transcode?

Tested on on 16/24 Bit 44.1/48/96/192 FLAC files an could not replicate. for Clip testing I used Moto X4 with on Audio Technica ATH-M50x and with Steel series USB Sound Card, also recorded with TASCAM US 2x2 24/96 to directly inspect waveform of original FLAC and resulted M4A no artifacts found.

Can you please us FLAC sample file for analyze?

Re: Autotranscode produces artifacts

Posted: Thu May 09, 2019 6:54 am
by beaches09
Thanks man. I was just coming back to post an update.

My great apologies, I realized it's not the transcoder, just the app. The songs play normal in a different player. So it's something with the beta app. And I understand it's beta so I could always roll back. But this is good, since it's not the autotranscode process. Because I very much like this feature. 8)

Re: Autotranscode produces artifacts

Posted: Thu May 09, 2019 9:21 am
by Lowlander
Try disabling Volume Leveling and Equalizer in MMA. Do you still experience the problem?

Re: Autotranscode produces artifacts

Posted: Fri May 10, 2019 9:07 pm
by beaches09
I don't have any of the auto volume leveling options enabled on either program, but you're right, turning off the EQ on mma fixes the issue.

Re: Autotranscode produces artifacts

Posted: Mon May 13, 2019 12:10 pm
by Peke
Hi,
Clipping prevention in MMA 1.x is not that perfect and we are planning to improve that in v2.x where we are looking in better control than system one.