Envelope Follower on A4?

[soundxplorer]

Is it possible to set up an envelope follower type of modulation within the Analog Four? For example, having the filter cutoff track the volume of the audio from the Ext IN jacks?

This would be sort of the same thing as side-chaining. Basically using the amplitude of an external signal to generate a control voltage. The A4 seems like it could be a really good filter bank to process other signals, but I can’t tell if it has the env follower feature from reading the manual.

[avantronica]

yep, that will work - however, i am not too sure what becomes of the audio, i expect it’s simplified to a ‘DC’ version of sorts - it will be serviceable, but maybe not as much as a ‘steady’ control voltage would be

i don’t know if that port is high-end filtered (it was on the og P’08)

[PeterHanes]

@soundxplorer

For example, having the filter cutoff track the volume of the audio from the Ext IN jacks?

There is no way to follow the level of the Analog Four’s audio EXT IN inputs. That’s why the AF will never replace my DSI Evolvers and some other gear in my setup.

However, as @avantronica hints, you may be able to get some results by applying your audio signal to the EXP/CV IN control input.

@soundxplorer

The A4 seems like it could be a really good filter bank to process other signals

It’s one of my favourite applications for it!

[avantronica]

Yes - that ^ is what i meant - Ext in Exp in - should get some glasses and/or read slower

thanks Peter

[RustyRoses]

Envelope follower is a feature of the Analog Heat out of the box and works nicely btw

[soundxplorer]

Thanks for the replies. The CV Control Inputs are promising, but I’m really wondering if you’ve tested that out @avantronica? The input would be expecting a DC signal, not audio. Usually there is other circuitry involved to get a DC signal from the amplitude of an audio signal. That would still leave me with generating the CV from something else, like my modular.

[avantronica]

I think I tried this, it probably wasn’t a methodical selection of audio source material and I don’t recall any oooh moments. But I think it will do something, but not as usefully as an envelope follower does

I’m minded to try again, and will give feedback I’d I do fwiw. It’s safe to assume it’s not optimised for the envisaged use case, but may still be interesting if not quite as per hopes

[PeterHanes]

@soundxplorer

The CV Control Inputs are promising, but I’m really wondering if you’ve tested that out

Previously on Elektronauts:

A4 mk2 and AR mk2 CV side-chaining and other tips

I´ve been exploring the CV controls of the A4 and AR lately and to my pleasant surprise both of the devices react very well to audiorate modulation. Dialing in the settings for a side-chain effect was way easier than I had previously though it would be, and its nice to have 4 more options to use in conjunction with the amp volume level. After bitching about the AR mk2 only having one LFO per track in several threads I can´t help but to consider I might be a bit dense. Now that I´ve begun to u…

Audio in to CV inputs on Analog Heat & Analog Four MKII

Can alternative audio sources be sent into the CV inputs to modulate something like the filter cutoff frequency? This can be done with Waldorf 2-pole, which I sold to buy the analog heat. An example would be to send a synth pad inserted into the main input of the heat but then with the cutoff being modulated by a drumloop inserted into the CV input. The analog heat doesn’t seem to convert audio to CV, do you know why? I wish I could do the same on my analog four. I have been looking at ‘Littl…

[RustyRoses]

I can’t belive I didn’t think to run 2 CV outputs back into the 2 CV inputs for additional modulations.