Forum: GNU Radio Audio underruns - Sending signals over audio

Announcement (2017-05-07): www.ruby-forum.com is now read-only since I unfortunately do not have the time to support and maintain the forum any more. Please see rubyonrails.org/community and ruby-lang.org/en/community for other Rails- und Ruby-related community platforms.
C4fd8efd4bb4f05a259b97d4ff7df858?d=identicon&s=25 Paul Sc (paschka)
on 2016-06-17 18:15
Attachment: flowgraph.jpg (100 KB)
Attachment: senden.grc (20 KB)
Hi,

I'm getting frequent audio underruns and I can't figure out why.

I'm trying to transmit data over audio signals based on [1] in an
uncontinuous way, as i'm using packets.
The problem is that after a while I get consecutive audio underruns
(like, for several seconds straight). The "TunSource" block you can see
in the picture just outputs data from a tun device, though it also
happens with the other blocks like "Socket PDU".
I already tried using a slightly different sample rate than the audio
sink has but I still got underruns. I'm quite new to this field so maybe
I'm just missing a major point.
I hope you can help me.

Edit: To clarify: This also happens, when I use a file source.

Thanks

Paul


[1] https://www.anfractuosity.com/projects/ultrasound-...
This topic is locked and can not be replied to.