Thanks Dr Tensi,
Those examples are fantasic and give me a great base to work from.
Kind regards
Darryl
On 4/6/20, 12:34 am, "Dr. Thomas Tensi" <t.tensi@xxxxxx> wrote:
Hello Darryl,
you wrote:
> [modulate a sine wave with another in SoX?]
What you could do as an easy approach is modulate a sine wave with a
tremolo. Assume a target bit depth of 24bit, a sample rate of 44.1kHz, a
carrier of 1500Hz with a length of 20s and a modulation of 0.5Hz with a
depth of 100%
sox -n -b 24 -r 44100 test.wav synth 20 sine 1500 tremolo 0.5 100
Tremolo can only do a sine modulation with a fixed phase of 90°.
Even more powerful is the cascading of synth effects. Same logic, the
carrier is amplitude-modulated by a sine with 0.5Hz with the same 20s
length:
sox -n -b 24 -r 44100 test.wav synth 20 sine 1500 synth 20 sine amod 0.5
If you don't want a full modulation (from 0 to 100%), you can add a
dc-offset to the second waveform.
Hope this helps!
Best regards,
Thomas
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