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[asterisk-users] Which sound file formats?

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raanders at acm.org
Guest

Posted: Mon May 12, 2008 3:57 pm Post subject: [asterisk-users] Which sound file formats?

I've got the text files created -- thanks to Russell Bryant -- for re-building the core and extra sounds using another voice but I'm not sure which formats to actually build. This will be a small/personal system using Vitelity.net so will only have SIP connections. The /var/lib/asterisk/sounds/ directory contains .alaw, .g722, .g729, .gsm, .ulaw, and .wav. What are the minimal formats I need or can get by with. Possibly even an ordered preference list. Thanks, Rod --

bwentdg at pipeline.com
Guest

Posted: Mon May 12, 2008 4:05 pm Post subject: [asterisk-users] Which sound file formats?

Asterisk will automatically chose the best format - per ATFOT

Roderick A. Anderson wrote:

Quote:

joakimsen at gmail.com
Guest

Posted: Mon May 12, 2008 4:27 pm Post subject: [asterisk-users] Which sound file formats?

Best is to keep native format files for all codecs you intend to use.

Where are these rebuilt files with another voice? And any chance
they'll ever be done by Pat Fleet or "Ann," the Cisco voice? FWIW I'm
in contact with someone who's been in contact with Pat who says she's
willing to do it but we don't think its worth the effort unless these
were distributed officially.
On Mon, May 12, 2008 at 4:57 PM, Roderick A. Anderson <raanders at acm.org> wrote:

Quote:

I've got the text files created -- thanks to Russell Bryant -- for
re-building the core and extra sounds using another voice but I'm not
sure which formats to actually build.

This will be a small/personal system using Vitelity.net so will only
have SIP connections.

The /var/lib/asterisk/sounds/ directory contains .alaw, .g722, .g729,
.gsm, .ulaw, and .wav.

What are the minimal formats I need or can get by with. Possibly even
an ordered preference list.

Thanks,
Rod
--

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tilghman at mail.jeffa...
Guest

Posted: Mon May 12, 2008 5:09 pm Post subject: [asterisk-users] Which sound file formats?

On Monday 12 May 2008 16:27, Andreas van dem Helge wrote:

Quote:

One of the issues with recording sounds is that it typically is not a one-time
deal. New recordings are added about 4 times a year, based upon demand
for new features. The other issue is the license on the sound files,
themselves. If you're interested, please have the voice artist contact Kevin
Fleming at Digium.

--
Tilghman

raanders at acm.org
Guest

Posted: Mon May 12, 2008 5:22 pm Post subject: [asterisk-users] Which sound file formats?

Andreas van dem Helge wrote:

Quote:

I'm doing this for my own system. I picked Callie-8kHz, from Cepstral,
and want all the core and extra sounds done in her voice. I'm not going
to, nor do I think I can, distribute these.
Rod
--

Quote:

On Mon, May 12, 2008 at 4:57 PM, Roderick A. Anderson <raanders at acm.org> wrote:

Quote:

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raanders at acm.org
Guest

Posted: Mon May 12, 2008 5:27 pm Post subject: [asterisk-users] Which sound file formats?

Al Baker wrote:

Quote:

Asterisk will automatically chose the best format - per ATFOT

I guess I'm not getting my head wrapped around this concept. I
understand the choosing but not how I might influence it. Probably best
to just build them all and let Asterisk sort it out. I'll research this
some more.

Thanks Al.
Rod
--

Quote:

Roderick A. Anderson wrote:

Quote:

tilghman at mail.jeffa...
Guest

Posted: Mon May 12, 2008 5:37 pm Post subject: [asterisk-users] Which sound file formats?

On Monday 12 May 2008 17:27, Roderick A. Anderson wrote:

Quote:

Al Baker wrote:

Quote:

Asterisk will automatically chose the best format - per ATFOT

If you want to produce just one, I'd recommend producing slin or wav, as
they are essentially the same (slin is just wav without the header). The
thing to note about this format is that as it is uncompressed, you will reduce
the amount of work needed for transcoding (other than if you have native
files), because transcoding from, for example, gsm to speex requires two
transcoding operations: first, uncompress from gsm, and second, compress
to speex. By adapting the most common intermediate format, you only need one
transcoding operation per packet. Native files require no transcoding at all.
Transcoding tends to be the most CPU intensive task on a typical Asterisk
machine.

--
Tilghman

raanders at acm.org
Guest

Posted: Mon May 12, 2008 6:44 pm Post subject: [asterisk-users] Which sound file formats?

Tilghman Lesher wrote:

Quote:

On Monday 12 May 2008 17:27, Roderick A. Anderson wrote:

Quote:

Al Baker wrote:

Quote:

Asterisk will automatically chose the best format - per ATFOT

Tilghman,

Once again you come through clear. But just to make sure I transcode
this correctly I can remove all the other formats and only have .wav
and/or .slin files.

Simple and clean. Plus swift can generate the .wav files optimized for
VoIP. I can go sox-less. Smile

Thanks,
Rod
--

tilghman at mail.jeffa...
Guest

Posted: Mon May 12, 2008 7:54 pm Post subject: [asterisk-users] Which sound file formats?

On Monday 12 May 2008 18:44, Roderick A. Anderson wrote:

Quote:

Tilghman Lesher wrote:

Quote:

On Monday 12 May 2008 17:27, Roderick A. Anderson wrote:

Quote:

Al Baker wrote:

Quote:

Asterisk will automatically chose the best format - per ATFOT

If you want to produce just one, I'd recommend producing slin or wav, as
they are essentially the same (slin is just wav without the header). The
thing to note about this format is that as it is uncompressed, you will
reduce the amount of work needed for transcoding (other than if you have
native files), because transcoding from, for example, gsm to speex
requires two transcoding operations: first, uncompress from gsm, and
second, compress to speex. By adapting the most common intermediate
format, you only need one transcoding operation per packet. Native files
require no transcoding at all. Transcoding tends to be the most CPU
intensive task on a typical Asterisk machine.

Tilghman,

Once again you come through clear. But just to make sure I transcode
this correctly I can remove all the other formats and only have .wav
and/or .slin files.

Correct. Just make sure that the wav files are 8000Hz, 16 bit signed linear
samples, single channel (mono) only. Anything else will not give the desired
results.

Quote:

Simple and clean. Plus swift can generate the .wav files optimized for
VoIP. I can go sox-less. Smile

If you have the 8kHz voices, the default swift output will be exactly what
Asterisk requires. The 16kHz voices will need to be down-sampled, however.

--
Tilghman

Guest

Posted: Mon May 12, 2008 8:01 pm Post subject: [asterisk-users] Which sound file formats?

Quote:

If you want to produce just one, I'd recommend producing slin or wav,

Quote:

they are essentially the same (slin is just wav without the header).

The

Quote:

thing to note about this format is that as it is uncompressed, you

will

Quote:

reduce
the amount of work needed for transcoding (other than if you have

native

Quote:

files), because transcoding from, for example, gsm to speex requires

two

Quote:

transcoding operations: first, uncompress from gsm, and second,

compress

Quote:

to speex. By adapting the most common intermediate format, you only

need

Quote:

one
transcoding operation per packet. Native files require no transcoding

Quote:

all.
Transcoding tends to be the most CPU intensive task on a typical

Asterisk

Quote:

machine.

I recently paid Allison Smith to produce a few prompts for me. I was
able to use the .gsm ones on Asterisk but not for the high quality .wav
files.
However, I was able to play the wav file produced by text2wav.
So, I ended up just using the .gsm format.

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