Hello list!
I’ve been working on building our new repeater using AllStar on a Pi-3 as the controller, URI-X as the audio interface, and a pair of CDM-1250’s as XMit and receive radios. At first, when I set everything up, all was working wonderfully. But now, after being up a couple of days, I’m hearing a delay in the transmit – I key up, announce my callsign, unkey, and I actually hear the last bit of my transmit audio as an “echo”. Doing some research thru the mailing list, it seems to indicate this might be the system being a little underpowered – is this a regular occurrence with a Pi in duplex mode? Would upgrading to something more powerful help? Been looking at something like the Qotom or Protectl small form factor PCs – but I’m a little concerned about they would hold up in the heat. Our building at the tower site does not have any cooling in it, and it can get rather warm during the summertime.
Another question – can the AllStar version of Asterisk directly play MP3-formatted audio? I’m considering some functions using Amazon’s Polly Text-to-Speech service, which provides MP3 files, so I’m wondering if Asterisk could play them directly, or if I’d have to use sox to convert them to another format first.
Thanks!
Jeremy, NQ0M
Hello list!
…
Another question - can the AllStar version of Asterisk directly play
MP3-formatted audio? I’m considering some functions using Amazon’s Polly
Text-to-Speech service, which provides MP3 files, so I’m wondering if
Asterisk could play them directly, or if I’d have to use sox to convert them
to another format first.
Use ‘sox’ to convert mp3’s to a format you can use.
sudo apt-get install sox libsox-fmt-mp3
For example you can use ‘sox xxx.mp3 xxx.wav’ to convert from mp3 to wav.
Sox supports almost 100 different sound file formats as well as a large number of special effects.
…
···
On Wednesday, November 21, 2018 5:20:37 PM PST jerutley@gmail.com wrote:
–
Ken - N7IPB
Email: n7ipb@wetnet.net
JID: n7ipb@jabber.wetnet.net
SvxLink Repeaters: http://pnw220.wetnet.net
PGP Sig: F42B EF90 3CD3 31C7 3056 122E 993A 7B2E 5138 C42A
“Contrariwise,’ continued Tweedledee, 'if it was so, it might be;
and if it were so, it would be; but as it isn’t, it ain’t. That’s logic.”
As far as the little bit of audio delay you hear… every system I’ve been on, or put together has that delay.
Some people are quick to unkey the mic, while others wait about a second to unkey, after they are done talking.
Just take into consideration the time you gotta key up, before you’re heard (pl tone decode on the rotr, dcs, whatever) and add that to your unkey process and you’ll never hear the repeated audio again.
If you want to hear the ‘digital delay’, turn on another radio and listen to the local repeater while you talk into it.
···
On Wed, Nov 21, 2018, 20:28 Ken Koster <n7ipb@wetnet.net wrote:
On Wednesday, November 21, 2018 5:20:37 PM PST jerutley@gmail.com wrote:
Hello list!
…
Another question - can the AllStar version of Asterisk directly play
MP3-formatted audio? I’m considering some functions using Amazon’s Polly
Text-to-Speech service, which provides MP3 files, so I’m wondering if
Asterisk could play them directly, or if I’d have to use sox to convert them
to another format first.
Use ‘sox’ to convert mp3’s to a format you can use.
sudo apt-get install sox libsox-fmt-mp3
For example you can use ‘sox xxx.mp3 xxx.wav’ to convert from mp3 to wav.
Sox supports almost 100 different sound file formats as well as a large number of special effects.
…
–
Ken - N7IPB
Email: n7ipb@wetnet.net
JID: n7ipb@jabber.wetnet.net
SvxLink Repeaters: http://pnw220.wetnet.net
PGP Sig: F42B EF90 3CD3 31C7 3056 122E 993A 7B2E 5138 C42A
“Contrariwise,’ continued Tweedledee, 'if it was so, it might be;
and if it were so, it would be; but as it isn’t, it ain’t. That’s logic.”
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