Hi all
I dont have a microphone to test this, but has anyone used the SMR4 shruthi as a vocoder?
Thanks
Hi all
I dont have a microphone to test this, but has anyone used the SMR4 shruthi as a vocoder?
Thanks
It’s not possible.
Dang,that settles that then , should I delete this thread then?
BTW I’m disappointed it took you 1 minute to reply
Yup, there’s no vocoder mode. A vocoder splits the input signal into bands using a FFT (quite CPU intensive) and then uses another signal to modulate it (internal oscillator usually). There’s no enough CPU grunt to do both things at the same time.
Although recently a faster way to do FFT was discovered:
A vocoder filter board might be possible though. But there’s lots of vocoders around.
Ive used it as the carrier source for a vocoder with one of these. Id like to get the cv ins working with the shurthi-1s cv outs BUT TIME MAN.
maybe someday fcd72 has so many shruthis, that he can use his shruthis with BP filters to build a huge vocoder. could work, if some gates were used.
one band would be something like: bp filter in the analysing signal > sidechain in of the gate. bp filter in signal chain> gate.
ambika could be used as the synth signal
FFT would be a poor choice for realizing a vocoder. You need only a handful of channels with a log spacing (constant-Q representation). Too many channels and your analysis is fine enough to capture pitch details (you don’t want that, just the spectral envelope) ; too few channels or oddly spaced channels and you can’t pick formants. So either you would use a large FFT size and would need to aggregate all the channels for the upper frequency bands (which would be wasteful, what’s the point of decomposing a signal into 1024 bands if you’re going to sum 256 of them), or you would use a small FFT size but have your vocoder sound “wrong” because the channels would be linearly spaced. I think using a bank of bandpass filters (just like the analog equivalent) implemented with one or 2 biquad sections would be more meaningful and more computationally efficient. It’s not particularly computationally intensive (got one with 9 channels to run at 44kHz on a 100 MHz ARM CPU), but certainly out of reach for the Shruthi-1 or a filter board. Not to mention that correctly generating the carrier (a handful of band-limited pulses, to get fat chords!) would take up a significant chunk of the CPU.
Too bad there’s no voice -> MIDI CC converter
I could attempt using the voice modulator on my JP-8080 for that, but it’s low-res and already has a decent vocoder built-in…
afaik the FFT-based vocoders are called phasevocoders (at least in c-sound they were called like that) a classic vocoder works with a bank of filters.
A phase-vocoder has nothing to do with what electronic musicians know as vocoders
Well, apart from time stretching and pitch shifting, we can “thank” the phase vocoder for things like Autotune, Lil Wayne and Kanye West. Gay fish y’all!
Isn’t auto-tune time-domain?
Oh, I forgot T-pain! Snooping around, it’s claimed it’s autocorrelation and a phase vocoder. Anywho, South Park really nailed it how Kanye West would act.
Well I wasnt looking for the super autotuned T-Pain, more like the intro to this : http://www.youtube.com/watch?v=tR6Z6Sratvg
Ooh, old school vocoder. It’s reminiscent of 1000 Knives by Sakamoto and its vocoder intro.
it cannot be achieved with a shruthi anyway
Jojjelito , exactly
The South Park guys said they had to deliberately sing badly out of tune to get the Kanye autotune effect-apparently Trey Parker’s vocal pitch was originally too good to trigger the effect