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Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy au
From: |
Ralph A. Schmid, dk5ras |
Subject: |
Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio |
Date: |
Thu, 15 Jan 2015 07:15:46 +0100 |
Only 44100 works, giving a clear dial tone. As DSD has fixed sampling rate 8k,
a resampler should do the trick. Things could be so easy :) I hate this audio
stuff...
Ralph.
-----Original Message-----
From: Marcus D. Leech [mailto:address@hidden
Sent: Thursday, January 15, 2015 06:41
To: Ralph A. Schmid, dk5ras; 'Tom Rondeau'
Cc: 'GNURadio Discussion List'
Subject: Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy
audio
On 01/15/2015 12:29 AM, Ralph A. Schmid, dk5ras wrote:
>> One could just try dial_tone.py example. That will exercise the audio
>> subsystem.
> Output is some garbled noise, and
>
> python$ python dial_tone.py
> INFO: Audio sink arch: alsa
> aUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaU
>
> So my audio stuff is defective, good to know :)
>
>> For alsa, in the device field in the audio sink, try something like
>> hw:0,0 or plughw:0,0
> Seems to be alsa already...hmm...so this comes later.
>
> Ralph.
>
>
It may just be that your audio-subsystem doesn't actually support the
sample-rate that the graph is configuring it for.
Here's the --help for dial_tone.py
Usage: dial_tone.py [options]
Options:
-h, --help show this help message and exit
-O AUDIO_OUTPUT, --audio-output=AUDIO_OUTPUT
pcm output device name. E.g., hw:0,0 or /dev/dsp
-r SAMPLE_RATE, --sample-rate=SAMPLE_RATE
set sample rate to RATE (48000)
Looks like the default is 48e3
Try other rates, like 44.1e3 or 32e3
- [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Chris Hallinan, 2015/01/14
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Marcus Müller, 2015/01/14
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Marcus D. Leech, 2015/01/14
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Tom Rondeau, 2015/01/14
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Ralph A. Schmid, dk5ras, 2015/01/14
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Marcus D. Leech, 2015/01/14
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Ralph A. Schmid, dk5ras, 2015/01/15
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Marcus D. Leech, 2015/01/15
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Ralph A. Schmid, dk5ras, 2015/01/15
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio,
Ralph A. Schmid, dk5ras <=
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Marcus D. Leech, 2015/01/15
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Ralph A. Schmid, dk5ras, 2015/01/15
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Ralph A. Schmid, dk5ras, 2015/01/15
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Remington Furman, 2015/01/15
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Remington Furman, 2015/01/15
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Ralph A. Schmid, dk5ras, 2015/01/16
- Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio, Chris Hallinan, 2015/01/16