# Playback file on multiple frequencies

**URL:** <https://www.ruby-forum.com/t/playback-file-on-multiple-frequencies/242057>\
**Category:** GNU Radio\
**Created:** [May 23, 2015, 4:41pm UTC](https://www.ruby-forum.com/t/playback-file-on-multiple-frequencies/242057 "2015-05-23T16:41:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [May 23, 2015, 4:41pm UTC](https://www.ruby-forum.com/t/playback-file-on-multiple-frequencies/242057/1 "2015-05-23T16:41:13Z")

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Hi everyone.

I have a single channel radio (USRP N210) that I am trying to playback a  
file on multiple frequencies with. I assume a need a sort of  
channelizer function but am having difficulty implementing this.  
Basically, I have a WAV file that I need to playback on various  
frequencies that I set and have it combine into one data stream for the  
N210. Can anyone advise on ways to do this?

Thanks,  
Tim