inaSpeechSegmenter
nrsc5
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inaSpeechSegmenter | nrsc5 | |
---|---|---|
3 | 22 | |
695 | 766 | |
2.9% | 1.7% | |
6.4 | 6.2 | |
about 1 month ago | 4 days ago | |
Python | C | |
MIT License | GNU General Public License v3.0 or later |
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inaSpeechSegmenter
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Listen to HD radio with a $30 RTL SDR dongle
I have a little hobby project where I record an FM radio music station using a SDR and then remove all the non-music portions for offline listening. I like the music selections the DJs pick, but I prefer not to listen to the DJ commentary and the advertisements.
I evaluated three methods of recording: analog capture from a standalone FM receiver, using this nrsc5 library to record the "HD" radio stream, and using an AirSpy SDR with this library: https://github.com/jj1bdx/airspy-fmradion
Recording the "HD" (what a misnomer) radio was nice in that there was no hiss or multipath effects, but in comparison to the other methods the digital compression artifacts became impossible to un-hear. It seems to top out at about 96 kbps
The airspy-fmradion library has some nice stuff in it to address multipath, resulting in the best audio quality of the three methods I tested.
I use https://github.com/ina-foss/inaSpeechSegmenter to identify which segments of the recordings are speech vs. music.
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(Unpopular?) opinion: KEXP’s John Richards is annoying AF
One key library that makes it possible is this one: https://github.com/ina-foss/inaSpeechSegmenter
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ytmdl Web - A webapp that lets you download music by getting the audio from YouTube and metadata from various sources like Itunes, Last.FM, Gaana and others. v2 released with lots of fixes.
After looking for a few options, I came across inaSpeechSegmenter. It is a speech segmenter and if you pass it an audio file, it returns the time segments of noises and music.
nrsc5
- Nrsc5: Receive NRSC-5 digital radio stations using an RTL-SDR dongle
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Listen to HD radio with a $30 RTL SDR dongle
That decision was made by the original author (Andrew Wesie), but I think it makes sense because nrsc5 only needs a tiny fraction of the functionality that GNU Radio provides. Implementing the functionality directly in nrsc5 avoids the need for a large and complex dependency.
One downside is that we don't get the broad hardware support that GNU Radio provides, but maybe we'll someday take another crack at integrating SoapySDR. (See https://github.com/theori-io/nrsc5/pull/131 for an earlier experiment with that.)
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Why does the spectrum analyzer have a square wave by 102.25 MHz, I see the often in FM broadcasting.
That's HD radio, the sidebands are digital audio. It can be decoded with nrsc5 and an rtl-sdr.
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What is the divergence point of streaming AAC overtaking OTA FM audio quality ?
An article called "Decoding and Listening to HD Radio (NRSC-5) with an RTL-SDR" links to a security researcher's write-up called "Receiving NRSC-5" about how they wrote the software to do it. That links to the actual nrsc5 software on GitHub.
- Square waves in WFM broadcast?
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Looking for a good AM/FM Radio sollution
There is loads of software that will work such as SDR++, GQRX, CubicSDR, and SDRangel just to name a few. For HD radio reception, there is nrsc5. Nrsc5 only works with an rtl-sdr, so you will need one if you want to receive HD radio.
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Can I be tuned in to multiple FM stations at once?
In theory could https://github.com/theori-io/nrsc5 be listening to all hd radio at once?
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Thousands of Mazdas in the Seattle area are stuck on a single FM radio station
HD Radio is closed and proprietary, but there is at least one FOSS receiver out there: https://github.com/theori-io/nrsc5
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What are these bands to the left/right of the two main CBC signals? Not RDS, but appears to be data of some sort? The FM station at 90.7 and 91.5 are both CBC (French & English broadcasts).
NRSC5 is a decoder that I use. If you are on windows there are a couple of extra steps you have to take compile it, but it works well! They have a newer one with a GUI that can also display album art.
What are some alternatives?
pyannote-audio - Neural building blocks for speaker diarization: speech activity detection, speaker change detection, overlapped speech detection, speaker embedding
sdrangel - SDR Rx/Tx software for Airspy, Airspy HF+, BladeRF, HackRF, LimeSDR, PlutoSDR, RTL-SDR, SDRplay RSP1 and FunCube
madmom - Python audio and music signal processing library
nrsc5-gui - A graphical interface for nrsc5
GuitarTuner - Guitar tuner program made with Python, Tkinter and PyAudio.
nrsc5-dui - An enhanced, user-friendly version of nrsc5-gui that is not heavily dependent upon Python processing for audio generation.
ytmdl - A simple app to get songs from YouTube in mp3 format with artist name, album name etc from sources like iTunes, Spotify, LastFM, Deezer, Gaana etc.
dsd - Digital Speech Decoder
ffsubsync - Automagically synchronize subtitles with video.
yellowShoes - nrsc5 (HD FM) radio player
subaligner - Automatically synchronize and translate subtitles, or create new ones by transcribing, using pre-trained DNNs, Forced Alignments and Transformers. https://subaligner.readthedocs.io/
docker-rtlsdrairband - Docker container to run rtlsdir-airband + ice cast to stream ATC audio locally or to a remote server