From: Muni Sekhar <munisekharrms@gmail.com>
To: alsa-devel <alsa-devel@alsa-project.org>, linux-sound@vger.kernel.org
Cc: LKML <linux-kernel@vger.kernel.org>,
kernelnewbies <kernelnewbies@kernelnewbies.org>
Subject: ALSA: arecord : silennce recorded as 0x80
Date: Thu, 13 Apr 2023 19:19:52 +0530 [thread overview]
Message-ID: <CAHhAz+haVH-4Hgsz0PpTgUSW1pX4XxwxXwEd7nLVb0sFFwQwCg@mail.gmail.com> (raw)
Hi all,
I recorded the silence on the default audio card by running "arecord
-d 5 test.wav."
Once it exited, I checked the contents by running "hexdump test.wav,"
and I see that silence is recorded as a sequence of 0x80 instead of
0x00.
0000000 4952 4646 0024 8000 4157 4556 6d66 2074
0000010 0010 0000 0001 0001 1f40 0000 1f40 0000
0000020 0001 0008 6164 6174 0000 8000 8080 8080
0000030 8080 8080 8080 8080 8080 8080 8080 8080
0000040 8080 8080 8080 8080 8080 8080 8080 8080
...
What might be the reason for silence being recorded as 0x80 instead of 0x0?
--
Thanks,
Sekhar
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
next reply other threads:[~2023-04-13 13:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-13 13:49 Muni Sekhar [this message]
2023-04-14 10:15 ` ALSA: arecord : silennce recorded as 0x80 Luke Koch
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAHhAz+haVH-4Hgsz0PpTgUSW1pX4XxwxXwEd7nLVb0sFFwQwCg@mail.gmail.com \
--to=munisekharrms@gmail.com \
--cc=alsa-devel@alsa-project.org \
--cc=kernelnewbies@kernelnewbies.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-sound@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).