How to amplitude modulating a signal?

Hello

I'm pretty new to this (hearing 3) program and I use it for psychoacoustic research.

My problem: I just want to amplitude modulate (parameters: depth of modulation and frequency modulation) signals, but cannot find where to...? I found the part of frequency modulation, I have assumed this amplitude modulation would be in the same area. I checked the help file, but it said nothing about it. Is it still possible?

This is probably a simple solution, but I spent hours looking for (in the program, file help and on the internet).

Thanks in advance.

Use the edit mode.

The signal of your message, you need to create a carrier wave in a separate file of exactly the same length as the message. (But I'm sure you knew that already).

Select the carrier all & copy to Clipboard (Ctrl + C), the message and use ADSI > Mix paste > Modulate (dsbsc product * in multiplying two signals).

Then (carrier is still in the Clipboard) Edit > Mix paste > overlap (Mix) (adds the carrier for the signal of dsbsc producing dsbfc *).

* dsbsc = carrier suppressed double band side dsbfc = full carrier double sideband amplitude modulation that is.

Notes:

The modulation depth is determined by the relative amplitudes of the message and carrier and figure you next use the L and R faders in the Mix Paste window. I'll let experiment them for you.

Use the files of float 32 bits for all signals. Then, it matter that your final waveform is greater than 0 dBFS.

If you need a high carrier frequency, you will need a high sampling rate. You know too, but note that if you do not need to feed the result of a sound card, hearing allows you to use very high sampling rates high. I'm not sure what the limit is in this case. Useful if you want to simply view the waveforms.

Edit > Mix paste > Modulate multiplies in fact two signals. If you remember your theory of modulation, you will know which translates dsbsc.

Tags: Audition

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