From Florian Anwander Sent Fri, Mar 22nd 2019, 22:05
Hi > Is there a product or pseudo-code somewhere that self tunes the bands > in this way? Seems very exciting, some kind of patchable Cepstrum or > Mel Frequency Coding Module. No I don't know of any device or code. I often thought about to try this out in at least the nord modular or perhaps in Max/MSP (but I would have to learn that first). I once (ten or fifteenyears ago) talked with Dieter Döpfer about it. I wanted a vocoder with linear frequency distribution for non-vocal modulators, and he gave me the direction to ideas like Cepstrum and MFC. But he said he never followed that because his sales depend (or at least depended at that time) on quite conservative people who wanted mostly let their string machine say: 'Auuu-tooh-baaan'. If you use the idea of a linear spectrum or log power spectrum, then you need much more bands to cover the frequency "regions" which define the vowels. And that would become expensive in analogue hardware. Florian