Dither/Noise Shaping not working correctly for FLAC and WavPack (FIXED)

Mercado_Negro · 07-10-2021, 07:34 AM

I just noticed that exporting 24bit WavPack and FLAC files with Dither and Noise Shaping (from 32bit) for selected tracks (stems) isn't doing the job properly. Let's check it with null tests:

I've attached a project with 3 tracks:

Track 1 has a file that was rendered as 32bit WAV.

Track 2 has a file that was rendered as 24bit FLAC with Dither and Noise Shaping using the option "Master Mix" in the render dialog.

Track 3 has a file that was rendered as 24bit FLAC with Dither and Noise Shaping using the option "Selected tracks (stems)" in the render dialog.

When rendering: The Master Track was always at 0dB. No plug-ins involved.

Steps:

1) Solo track 1 and track 2
2) Invert polarity on track 1
3) Hit play

Result: Only the dither noise is heard as expected.

4) Now unsolo track 2 and solo track 3
5) Hit play

Result: The dither noise is heard (and the noise is very loud and I think it wasn't even shaped) and we can heard the kick drum distorted.

The same thing happens with WavPack.

Project:
https://u.pcloud.link/publink/show?c...h1UWAQkzkk4AX0

schwa · 07-10-2021, 08:13 AM

Fixing, thanks. In versions 6.30-6.32, the dither and noise shaping checkboxes are applied correctly to the master mix, but ignored when rendering stems.

Mercado_Negro · 07-10-2021, 08:15 AM

Thanks, Schwa!

07-10-2021, 07:34 AM	#1
Mercado_Negro Moderator Join Date: Aug 2007 Location: Caracas, Venezuela Posts: 8,732	Dither/Noise Shaping not working correctly for FLAC and WavPack (FIXED) I just noticed that exporting 24bit WavPack and FLAC files with Dither and Noise Shaping (from 32bit) for selected tracks (stems) isn't doing the job properly. Let's check it with null tests: I've attached a project with 3 tracks: Track 1 has a file that was rendered as 32bit WAV. Track 2 has a file that was rendered as 24bit FLAC with Dither and Noise Shaping using the option "Master Mix" in the render dialog. Track 3 has a file that was rendered as 24bit FLAC with Dither and Noise Shaping using the option "Selected tracks (stems)" in the render dialog. When rendering: The Master Track was always at 0dB. No plug-ins involved. Steps: 1) Solo track 1 and track 2 2) Invert polarity on track 1 3) Hit play Result: Only the dither noise is heard as expected. 4) Now unsolo track 2 and solo track 3 5) Hit play Result: The dither noise is heard (and the noise is very loud and I think it wasn't even shaped) and we can heard the kick drum distorted. The same thing happens with WavPack. Project: https://u.pcloud.link/publink/show?c...h1UWAQkzkk4AX0 __________________ Pressure is what turns coal into diamonds - Michael a.k.a. Runaway

07-10-2021, 08:15 AM	#3
Mercado_Negro Moderator Join Date: Aug 2007 Location: Caracas, Venezuela Posts: 8,732	Thanks, Schwa! __________________ Pressure is what turns coal into diamonds - Michael a.k.a. Runaway

07-10-2021, 08:13 AM	#2
schwa Administrator Join Date: Mar 2007 Location: NY Posts: 16,954	Fixing, thanks. In versions 6.30-6.32, the dither and noise shaping checkboxes are applied correctly to the master mix, but ignored when rendering stems.