Trying to find best practice to pitch down (and occasionally up) by few semitone a huge bank of audio files. No time-stretching just speed down and up. Seems to be easy with any DAW or editor but there is a noticeable audio degradation. All the files were recorded in 48k 24bit and I can’t go back to re-record it in bigger resolution.
If anyone has some tips I would greatly appreciate it!
Ok right there are few plugins for warping and pitch shifting but I’m actually just looking for a simple (if there is) solution for transposing audio file that doesn’t lower the resolution bandwidth of the recording (what simple pitch shifting does unfortunately).
I don’t want to preserve the tempo just pitch it down few semitones and I can’t re-record the files unfortunately and it’s all about classical music recordings so any degradation is not very welcome this time.
It’s based on the superVP-engine which is the same as in AudioSculpt. AudioSculpt is also really great, but as far as I’ve heard there’s a new version coming (but maybe not untill a year from now). And the current one only runs in 32-bit. But that’s a really powerful tool too, and the next version is probably going to be great for spectral manipulations, pitchshifting and timestretching and all that stuff.
If you’re looking for a non-granular plugin, elastique pitch or melodyne are generally considered pretty high end solutions. Obviously, the quality of the result does depend on what material you’re feeding it.
In film music, dialogue, and sound effects work, the go-to plugin for transparent pitch shifting is Pitch-N-Time Pro from Serato. It’s been around for many years. It’s hideously expensive ($800), but it sounds really good. I bought it several years ago and it works very well. You should be able to get +/- 4 semitones without trouble. It has several algorithms to choose from, depending on the material and how far you want to go with it.
There is a first class way that doesn’t require an expensive plugin. It sounds as though you like the tape style pitch shifting in the new IRCAM tool. That Method, varispeed, is the easiest and best method for pitch shifting without artifacts, if it’s acceptable to have the length change at the same time as the pitch. It’s exactly like slowing or speeding up the tape you’ve recorded your sample on: sounds change pitch and duration simultaneously. There are no fft algorithms needed, and it sound great!