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From: "Dr. Thomas Tensi" <>
Subject: Re: Sine wave in an envelope
Date: Mon, 8 Jun 2020 13:11:53 +0200
Message-ID: <> (raw)
In-Reply-To: <>

Hello Jeff,

you wrote:
 > > [similar problem as amplitude modulating a sine wave]
 > I want to produce a stereo tremolo by using the sine amod
 > effect, out of phase on the left and right channels.

I am not sure whether this can be done in one command, but you could
modulate the channels into left and right mono versions and combine
(merge) the file into a stereo file. I assume that your source is in mono?
To paraphrase your solution:



# sox command fragments
tremPrefix=synth $LEN $OFFSET
tremSuffix=2 sine amod 0.5

sox $INFILE $tempfileLeft  $tremPrefix $phaseLeft  $tremSuffix
sox $INFILE $tempfileRight $tremPrefix $phaseRight $tremSuffix
sox -M $tempfileLeft $tempfileRight $OUTFILE

Is this what you wanted?

         Best regards,


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Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-03 11:38 Darryl Lewis
2020-06-03 14:33 ` Dr. Thomas Tensi
2020-06-03 15:05   ` Darryl Lewis
2020-06-03 15:13     ` Dr. Thomas Tensi
2020-06-07 21:05   ` Jeff Learman
2020-06-08 11:11     ` Dr. Thomas Tensi [this message]
2020-06-08 12:20       ` Jeff Learman
2020-06-08 15:13         ` Dr. Thomas Tensi
2020-06-08 19:24         ` Jeff Learman

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