# FM demodulator has no viable output

**URL:** <https://www.ruby-forum.com/t/fm-demodulator-has-no-viable-output/261491>\
**Category:** GNU Radio\
**Created:** [July 6, 2021, 1:55pm UTC](https://www.ruby-forum.com/t/fm-demodulator-has-no-viable-output/261491 "2021-07-06T13:55:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Labanana](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/e8c25b/32.png) [@Labanana](https://www.ruby-forum.com/u/Labanana)\
**Post date:** [July 6, 2021, 1:55pm UTC](https://www.ruby-forum.com/t/fm-demodulator-has-no-viable-output/261491/1 "2021-07-06T13:55:52Z")

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Hello,

I try to listen to a local radio (101.1MHz) with my own SDR (based on ADRV9002) set to a center frequency of 101.0MHz.

I can’t find a way to get a viable demodulation information using the different FM demodulator

 ![schema](https://www.ruby-forum.com/uploads/default/original/2X/1/1963871592ef0a88ac4e431bdb714538ae9af45d.png)

From the SDR after Xlating I get a spectrum where I can see the peak of the radio I try to listen to (can upload more than one image)

Infortunately I can’t get any sound.  
While reading the file I saved the output of FM demod, I get a sound with a peak at 19kHz.

As I’m quite a noob, any help or explaination is welcom.

PS : for context I run this in a virtual machine if it as any impact