bassfalk

I am new in this forum, and at the moment I am working on my first project using MaxMSP. What I want to do I think is rather simple: I want to modulate the frequency of the incoming audio signal. I worked through the FM tutorials, but of course there always a cycle~ object is modulated, and I couldn't figure out a way I can do that with an audio signal.

fm-on-audio

also as well you could replace the [adc~] with a [groove~]. Up to you really.

What Lewis demonstrated is an example of ring modulation on an incoming audio signal. If you want to do frequency modulation on a live audio signal, it is a bit more involved than you might think.

First what you need is a way of pitch shifting the incoming signal in realtime. Whatever method you use for pitch shifting, you must be able to control the amount of pitch shift with your modulating oscillator (i.e. your pitch shifter must be able to receive control from a signal). One thing to look at would be modifying the [transposer] abstraction in the pitchshifting-playground example. That as well as some uses of variable rate delays on FFT are two methods for doing this that are on my list of experiments. I am probably going to mess with that later this month, but it will be a few weeks. When I get to it, I'll surely post my results.

What Lewis demonstrated is an example of ring modulation on an incoming audio signal.  If you want to do frequency modulation on a live audio signal, it is a bit more involved than you might think.

First what you need is a way of pitch shifting the incoming signal in realtime.  Whatever method you use for pitch shifting, you must be able to control the amount of pitch shift with your modulating oscillator (i.e. your pitch shifter must be able to receive control from a signal).  One thing to look at would be modifying the [transposer] abstraction in the pitchshifting-playground example.  That as well as some uses of variable rate delays on FFT are two methods for doing this that are on my list of experiments.  I am probably going to mess with that later this month, but it will be a few weeks.  When I get to it, I'll surely post my results.


true, i should of said the example was for ring modulation...

audio input as a modulator (actually phase modulation)

Here's something I cobbled together from stuff on the site. Perhaps a little overcomplicated, as I'm not very experienced.

Thanks so much guys! This helps a lot further!

(Roth, I will appreciate seeing your results as well.)

I like this thread. 
(Roth, I will appreciate seeing your results as well.)


FM on audio