# How to import in Gnu Radio IQ.wav files recorder with SDR#?

**URL:** <https://www.ruby-forum.com/t/how-to-import-in-gnu-radio-iq-wav-files-recorder-with-sdr/232279>\
**Category:** GNU Radio\
**Created:** [September 29, 2014, 10:10pm UTC](https://www.ruby-forum.com/t/how-to-import-in-gnu-radio-iq-wav-files-recorder-with-sdr/232279 "2014-09-29T22:10:44Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [September 29, 2014, 10:10pm UTC](https://www.ruby-forum.com/t/how-to-import-in-gnu-radio-iq-wav-files-recorder-with-sdr/232279/1 "2014-09-29T22:10:44Z")

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Hi,  
I have recorded with FCD pro+ and SRD# some IQ.wav files.  
When I try to import them in Gnu Radio companion as a “File source” and  
plot the frequency spectrum with the “FFt sink” I get nothing.  
Are the IQ.wav files produced by the SDR# recognizable from the Gnu  
radio?

Thanks!

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**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [September 29, 2014, 10:32pm UTC](https://www.ruby-forum.com/t/how-to-import-in-gnu-radio-iq-wav-files-recorder-with-sdr/232279/2 "2014-09-29T22:32:46Z")

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Make sure you have a throttle block between the source and the FFT, set  
to the rate at which you captured the wav. Also, there is a Wav File  
Source under Audio. The plain File Source will also work (usually WAV is  
16-bit signed, 2 chan), but will have a little noise at the beginning  
(the wav header).

- Jeff

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**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [September 30, 2014, 4:05pm UTC](https://www.ruby-forum.com/t/how-to-import-in-gnu-radio-iq-wav-files-recorder-with-sdr/232279/3 "2014-09-30T16:05:24Z")

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You need an ishort-to-complex block after the file source. The file  
source does not convert for you. If that doesn’t work and your data is  
definitely good (and not too short), then no idea.

Please send replies to the list.

- Jeff

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<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [September 30, 2014, 4:15pm UTC](https://www.ruby-forum.com/t/how-to-import-in-gnu-radio-iq-wav-files-recorder-with-sdr/232279/4 "2014-09-30T16:15:08Z")

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Thank you Jeff!  
The ishort-to-complex block solve my problem

2014-09-29 23:59 GMT+03:00 Jeff L. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):