From: Jeff Learman <jjlearman@gmail.com>
To: thomas@tensi.eu, sox-users@lists.sourceforge.net
Subject: Re: Sine wave in an envelope
Date: Mon, 8 Jun 2020 15:24:14 -0400 [thread overview]
Message-ID: <CAGyjer5_0wb9ziRhjsZ--Et3P0B6pzFe+DZk6-yKrUG3Bqcsyw@mail.gmail.com> (raw)
In-Reply-To: <CAGyjer7ZcqDgD2yO3qLotFXpL2XRMnoaBDpy9PU8z-ZTUcpegg@mail.gmail.com>
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Ah, got it sorted:
LEN=0
OFFSET=0
LPHASE=40
RPHASE=90
FREQ=.75
For mono file:
sox in.flac out.flac remix 1 1 synth $LEN $OFFSET $LPHASE sine amod
$FREQ $OFFSET $RPHASE sine amod $FREQ
For stereo file:
sox in.flac out.flac synth $LEN $OFFSET $LPHASE sine amod $FREQ $OFFSET
$RPHASE sine amod $FREQ
Jeff
On Mon, 8 Jun 2020 at 08:20, Jeff Learman <jjlearman@gmail.com> wrote:
> Thanks. Actually I'll have both mono and stereo cases, but was asking
> about the stereo case. Of course I can split the stereo into two mono
> files. I was hoping to do it in one line, which was the real question here
> -- the synth effect documentation says it can operate differently on
> different channels but I couldn't figure how to make that work.
>
> Jeff
>
> On Mon, 8 Jun 2020 at 07:13, Dr. Thomas Tensi <t.tensi@gmx.de> wrote:
>
>> 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:
>>
>> -----
>> INFILE=rd73_064__E4_082.flac
>> OUTFILE=x.flac
>> tempfileLeft=left.flac
>> tempfileRight=right.flac
>>
>> LEN=0
>> OFFSET=0
>> phaseLeft=0
>> phaseRight=180
>>
>> # 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,
>>
>> Thomas
>>
>>
>> _______________________________________________
>> Sox-users mailing list
>> Sox-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/sox-users
>>
>
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prev parent reply other threads:[~2020-06-08 19:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-03 11:38 Sine wave in an envelope 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
2020-06-08 12:20 ` Jeff Learman
2020-06-08 15:13 ` Dr. Thomas Tensi
2020-06-08 19:24 ` Jeff Learman [this message]
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