I am reducing the bit depth of some FLACs from 24 to 16bit (maybe keeping 24, I am not sure) and the sample rate from 192k to 48k (per research it’s suggested to reduced in common divisors, so div by 4 is 48k).
The situation is that I am not sure what kind of dither to apply as per research it shows that the less intrusive distortion should be the triangular with shape option, however I have no idea about what shape form, extended shape form, intensity or if I should use adaptive mode.
I hope any expert in the community can give me some suggestions or explain a little more about these options to keep these FLACs as good as possible. Thanks!
If you keep the bit depth at 24, I wouldn’t bother about the dither. It is at -144 dBFS so no playback chain is able to make this audible.
If it is 16, dither is considered a must. Can’t advise you on the specifics.
https://www.linkedin.com/advice/0/what-pros-cons-different-types-dithering-algorithms#:~:text=Triangular%20dither%20adds%20a%20triangular,effectiveness%20in%20masking%20quantization%20errors.
Thanks for the great insight, it is interesting to learn about these details. I think that of I keep the FLACs 24 bit-48k it might not be the dither as you mention. Maybe dither becomes a lot more useful on some situations like podcast production to avoid the extra noise while keeping a relatively small file size.