Re: Sine wave in an envelope

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" <[email protected]> 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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