12 Mar
2006
12 Mar
'06
10:12 p.m.
The aim is:
- to generate high frequency sine (say, 1-10KHz - carrier),
- to modulate it's amplitude with low frquency signal (say, in 1-10Hz range),
- to pass this modulated signal through some device,
- to demodulate it, and, as a result,
- to get that 1-10Hz signal.
Is there sutable LADSPA plugins to construct this chain?
Thanks in advance!
Andrew
12 Mar
12 Mar
10:22 p.m.
On Mon, 2006-03-13 at 05:11 +0300, Andrew Gaydenko wrote:
The aim is:
- to generate high frequency sine (say, 1-10KHz - carrier),
The "Sine oscillator" in the LADSPA toolkit (1046/sine_fcaa)
- to modulate it's amplitude with low frquency
signal (say, in 1-10Hz range)
The "Sine oscillator" in the LADSPA toolkit (1047/sine_fcac)
- to pass this modulated signal through some device,
- to demodulate it, and, as a result,
- to get that 1-10Hz signal.
Not sure about this. Maybe use the "Frequency tracker" in swh-plugins
(1418/freqTracker) and subtract the known frequency of your high
frequency sine from the result?
--
Lars Luthman
PGP key: http://www.student.nada.kth.se/~d00-llu/pgp_key.php
Fingerprint: FCA7 C790 19B9 322D EB7A E1B3 4371 4650 04C7 7E2E
10:50 p.m.
New subject: [linux-audio-dev] Amplitude (de)modulation with JACK (was "with LADSPA")
Lars, thanks, I'll try.
!! Well, it seems like "to be inside LADSPA" is unneeded restriction.
Any JACK-enabled apps will be helpful. My mistake, sorry... The thread
subject was changed.
Andrew
======= On Monday 13 March 2006 05:21, Lars Luthman wrote: =======
On Mon, 2006-03-13 at 05:11 +0300, Andrew Gaydenko wrote:
The aim is:
- to generate high frequency sine (say, 1-10KHz - carrier),
The "Sine oscillator" in the LADSPA toolkit (1046/sine_fcaa)
- to modulate it's amplitude with low frquency
signal (say, in 1-10Hz range)
The "Sine oscillator" in the LADSPA toolkit (1047/sine_fcac)
- to pass this modulated signal through some device,
- to demodulate it, and, as a result,
- to get that 1-10Hz signal.
Not sure about this. Maybe use the "Frequency tracker" in swh-plugins
(1418/freqTracker) and subtract the known frequency of your high
frequency sine from the result?
--
Lars Luthman
PGP key: http://www.student.nada.kth.se/~d00-llu/pgp_key.php
Fingerprint: FCA7 C790 19B9 322D EB7A E1B3 4371 4650 04C7 7E2E
13 Mar
13 Mar
12:43 a.m.
New subject: [linux-audio-dev] Re: Amplitude (de)modulation with JACK (was "with LADSPA")
On 3/13/06, Andrew Gaydenko <a(a)gaydenko.com> wrote:
Lars, thanks, I'll try.
!! Well, it seems like "to be inside LADSPA" is unneeded restriction.
Any JACK-enabled apps will be helpful. My mistake, sorry... The thread
subject was changed.
Andrew
Just putting together ladspas with om should be the right tool for the job.
Loki
1:33 a.m.
New subject: [linux-audio-dev] Re: Amplitude (de)modulation with JACK (was "with LADSPA")
I have tried om, but (it's strange) qjackctl 'Connections' window doesn't
show om server, while 'Messages' window says about new connection.
======= On Monday 13 March 2006 07:43, Loki Davison wrote: =======
Just putting together ladspas with om should be the right tool for the job.
Loki
16 Mar
16 Mar
8:03 a.m.
New subject: [linux-audio-dev] Re: Amplitude (de)modulation with JACK (was "with LADSPA")
You need to create an Om patch with an audio output for it to show up.
I have tried om, but (it's strange) qjackctl
'Connections' window doesn't
show om server, while 'Messages' window says about new connection.
13 Mar
13 Mar
12:54 a.m.
New subject: [linux-audio-dev] Amplitude (de)modulation with JACK (was "with LADSPA")
On Mon, 2006-03-13 at 05:50 +0300, Andrew Gaydenko wrote:
Lars, thanks, I'll try.
!! Well, it seems like "to be inside LADSPA" is unneeded restriction.
Any JACK-enabled apps will be helpful. My mistake, sorry... The thread
subject was changed.
Are you trying to implement a soft modem or other network device as a
JACK client? That would be one of the coolest hacks ever...
Lee
1:36 a.m.
New subject: [linux-audio-dev] Amplitude (de)modulation with JACK (was "with LADSPA")
No :-) I try to do something to detect memory distortions:
http://peufeu.free.fr/audio/memory/
But this is OT for this list probably.
======= On Monday 13 March 2006 07:54, Lee Revell wrote: =======
...
Are you trying to implement a soft modem or other network device as a
JACK client? That would be one of the coolest hacks ever...
Lee
16 Mar
16 Mar
6:59 a.m.
New subject: [linux-audio-dev] Amplitude (de)modulation with JACK (was "with LADSPA")
Another possible application (in a slightly different spectrum):
http://en.wikipedia.org/wiki/Very_low_frequency
On Mon, 2006-03-13 at 08:36 +0300, Andrew Gaydenko wrote:
No :-) I try to do something to detect memory
distortions:
http://peufeu.free.fr/audio/memory/
But this is OT for this list probably.
======= On Monday 13 March 2006 07:54, Lee Revell wrote: =======
...
Are you trying to implement a soft modem or other network device as a
JACK client? That would be one of the coolest hacks ever...
Lee
--
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days inactive
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linux-audio-dev@lists.linuxaudio.org
8 comments
6 participants
participants (6)
-
Andrew Gaydenko -
Carlo Capocasa -
Jens M Andreasen -
Lars Luthman -
Lee Revell -
Loki Davison