# Gr-drm for GNU Radio 3.7 available

**URL:** <https://www.ruby-forum.com/t/gr-drm-for-gnu-radio-3-7-available/238468>\
**Category:** GNU Radio\
**Created:** [January 12, 2014, 10:48am UTC](https://www.ruby-forum.com/t/gr-drm-for-gnu-radio-3-7-available/238468 "2014-01-12T10:48:20Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**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:** [January 12, 2014, 10:48am UTC](https://www.ruby-forum.com/t/gr-drm-for-gnu-radio-3-7-available/238468/1 "2014-01-12T10:48:20Z")

</div>

Hi all,

I just want to make a quick announcement: gr-drm is now available for  
GNU  
Radio 3.7! Go and check it out under [GitHub - kit-cel/gr-drm: DRM transmitter using GNU Radio](https://github.com/kit-cel/gr-drm)!  
I  
also added a commit tag if you want to get the last version working with  
GR  
3.6. All others just get the latest version from the ‘stable’ branch.

For those of you who did not hear of this project before: gr-drm is a  
fully  
standard conformant software implementation of a DRM (Digital Radio  
Mondiale) transmitter. DRM is a digital short-wave broadcasting standard  
aimed at replacing existing analog technologies in the long run. With  
this  
project and a suitable HF front end (e.g. the USRP) you can set up your  
own  
DRM broadcast. Out of the box, you can either transmit an audio file of  
your choice or even your own voice using the microphone input. However,  
please keep your local spectrum regulations in mind before going on air  
;).

Decoding of the created signal is possible with any commercially  
available  
DRM receiver, but also with the open source tool DREAM which can be  
downloaded at SourceForge.

Greetings  
Felix W.

---

<div class="post-metadata">

**Author:** ![Felix\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/bb73d2/32.png) [@Felix\_W](https://www.ruby-forum.com/u/Felix_W)\
**Post date:** [April 16, 2014, 11:47am UTC](https://www.ruby-forum.com/t/gr-drm-for-gnu-radio-3-7-available/238468/2 "2014-04-16T11:47:44Z")

</div>

Odd quirk I’ve noticed: JACK audio will not work, however WAV files  
will.  
Tried streaming in WAV files from FFMPEG, but the WAV source wouldn’t  
read  
the shared pipe. Otherwise, ti works great. If you’re curious as to what  
I  
am doing, you can see my terrible flowgraph here:

> **[FMDigital](https://sourceforge.net/projects/fmdigital/)**
>
> Download FMDigital for free. In-band, on-channel digital radio for FM transmitters. FMDigital incorporates DRM (Digital Radio Mondale), and FM radio to create a sort of "Open HD Radio" using GNURadio. DRM code is from the gr-drm project.

Also, with WAV input, everything decodes great in Dream and SoDiRa. With  
JACK input (Audio source), the MSC does not decode.