How to change the amplitude of the audio generated by the command “Play[Sin[4402Pi*t],{t,0,10}]”?
What options deal with this issue?
Thanks…
Well, what have you tried? The most obvious thing would be to try and multiply the Sin with some sort of time dependent amplitude such as:
Play[1/(t + 1)*Sin[440 2 Pi*t], {t, 0, 10}]
which works just fine.
Of course you can multiply by any time dependent amplitude:
Play[Cos[2 Pi t]*Sin[440 2 Pi*t], {t, 0, 10}]
Cheers,
Marco
This might also be useful:
Play[Evaluate[Sin[440 2 Pi*t] Evaluate[Which @@ Evaluate[Flatten[{#[[1]] <= t <= #[[2]], 1./RandomInteger[{2, 10}]} & /@ Transpose[{Range[0, 9], Range[1, 10]}]]]]], {t, 0, 10}]
Thanks for your response.
What I don’t understand is why the following two Play commands seem to respond with the same volume sound:
Play[2Sin[4402Pit],{t,0,1}]
Play[20Sin[4402Pit],{t,0,1}]
I want to combine several amplitude waveforms each with its own volume coefficient.
Well, the particular example you give is a bit boring, because the two sin functions have have the same frequency (sorry for this incorrect way of expressing this…), but this would work:
Play[2 Sin[440 2 Pi t] 20 Sin[440 2 Pi t], {t, 0, 1}]
So the idea is that you multiply the sine functions and not the Play functions. Play produces a nice “sound object” which a graphical interface and all. What you are doing is multiplying the output of that.
Cheers,
Marco
Sorry for my lack of basic understanding that prevents me from stating my issue more clearly.
I have been looking in Help for the Play function and not seeing a volume control that I think should be available.
A simple example would be to combine a fundamental note with one overtone note and assign a volume independently to each.
“Play[(10 * Sin[4402Pit]) + (5Sin[8802Pi*t]),{t,0,1}]”
From what I hear it seems that the amplitude coefficients 10 and 5 are ignored in the sound output.
Thank you for a continued response…