From: "Måns Rullgård" <mans@mansr.com>
To: Mikko Olkkonen <molkko@gmail.com>
Cc: sox-users@lists.sourceforge.net
Subject: Re: How can I reduce 8svx file size further?
Date: Wed, 24 Aug 2022 14:27:40 +0100 [thread overview]
Message-ID: <yw1xzgft4vqr.fsf@mansr.com> (raw)
In-Reply-To: <CANWtmUBDSn7GVJSAgUn=ycg5pB4v106bVw6MLi5Y69VOGiVzkQ@mail.gmail.com> (Mikko Olkkonen's message of "Fri, 29 Jul 2022 22:10:01 +0300")
Mikko Olkkonen <molkko@gmail.com> writes:
> On Fri, Jul 29, 2022 at 8:50 PM Iarla Ó'Riada <iarlaoriada@gmail.com> wrote:
>
>> I’m using this command to create 8svx files:
>>
>> sox -q --multi-threaded --buffer 131072 -S -V -D "epoch.wav" "epoch.8svx"
>> remix - rate -v -s -I -b 99 -a 16754 gain -n -0.14 dither -S stats -b 8
>>
>> It’s good for ancient computers , but I’d like to reduce file size further
>> if possible. What’s the best way to do this?
>
> At least in my setup the file size seems to be very much proportional to -a
> value. e.g. 16754->8300 results in roughly halved file size. -a 1 results
> in file size of only 29 bytes! I dont know if this qualifies as "the best
> way to do it".
There seems to be some misunderstanding here. The -a flag to the rate
effect does not take an argument. The number you are playing with is
the target sample rate. Requesting a sample rate of 1 Hz amounts to
throwing out pretty much all the audio data, so it's no surprise the
resulting file is small.
As for the original question, 8svx files store uncompressed 8-bit
samples. The file size thus depends entirely on the sample rate and
the number of channels (which you've already reduced to one/mono).
Depending on the application, a low sample rate may be acceptable. For
reference, traditional landline telephony uses 8 kHz sample rate.
--
Måns Rullgård
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prev parent reply other threads:[~2022-08-24 13:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-29 17:48 How can I reduce 8svx file size further? Iarla Ó'Riada
2022-07-29 19:10 ` Mikko Olkkonen
2022-07-29 21:19 ` [Solved] " Iarla Ó'Riada
2022-08-24 13:27 ` Måns Rullgård [this message]
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