> I'm hoping that you're thinking of a realtime display, in which the
> peaks roll off to create a true waterfall effect.
Baudline (http://www.baudline.com) is a fantastic viewer that does fft
cascade. I've used it for a couple of years, and it is great for figuring out
how different sounds "work", and it has an oscilloscope-type display as well.
Cheers,
Jason Downer
Hello.
I finally started making my pet music project and realized I need a
drum synth to make some cool sounds. psindustrializer is good but also
need some tr-909-style sounds. I remeber from my old windoze days I
used a nice piece of software called Stomper. Does anybody know any
software for linux with comparable capabilities? Or we need to write
one?
Stomper does not work under wine :(
Thanks.
Hello.
I had a couple of articles on drum synths. Check
ftp://ftp.funet.fi/pub/sci/audio/devel/lad/drumsynth/
I built the circuit in a00*.jpg at the time when this article
was fresh. The article b00*jpg mentions an earlier article.
I will check that out at library.
Hmm.. I coded a drum synth for Commodore VIC-20 at the time.
VIC provided an audio chip with three oscillators, noise,
and a common volume if I remember correctly. What I did was to
modulate osc pitch and volume parameters with a fast and accurate
(compared to Basic) assembly code. The drum sounds were assigned to
the keys. This was about 1984, inspired by Yamaha's digital RX drum
synths, not by analog drums.
Juhana
--
http://music.columbia.edu/mailman/listinfo/linux-graphics-dev
for developers of open source graphics software
>From: "Levi D. Burton" <ldb(a)puresimplicity.net>
>
>does the idea of documenting various lad design patterns make
>sense to anyone?
Such "LAD Gems" doc would be much needed here too.
(For audio dsp gems, take a look at "musicdsp.org".)
I would appreciate if somebody would take a look at
Ardour and document best gems found there. E.g., the GUI
and audio thread separation and start up sequences.
Likewise for Linuxsampler and one of its GUI frontends.
Juhana
--
http://music.columbia.edu/mailman/listinfo/linux-graphics-dev
for developers of open source graphics software
Hi everyone,
Can anyone give me any examples of Free audio software being used by
professionals?
Anywhere where it performs better, or simply doesn't cost two or more
body parts to use?
Quick answers get bonus points.
James
--
"I'd crawl over an acre of 'Visual This++' and 'Integrated Development
That' to get to gcc, Emacs, and gdb. Thank you."
(By Vance Petree, Virginia Power)
Anyone have a good suggestion for a tutorial for making accurate
high-resolution high-priority clocks in C? I found some tutorials but
they were kinda old, so wondered if they might be out of date as to how
far real-time scheduling has come on linux. I want to be able to wake up
a pthread very accurately.
Thanks
Iain
Hi all,
I'm pretty new to the world of audio on linux, so please excuse the
"newbeeness" of my question. :-)
I'm a in the process of making a police/EMS/fire radio recorder. At
first, I tought of doing a program similar to ScanRec(1) from the
windows world -- that is not record when the sound is below a certain
threshold. This could easily be done with ecasound's -ge parameter.
However, I started thinking and found that it would be better to have a
different file for each segment. For example, if there is
- 45 seconds of speech, followed by
- 3 minutes of silence, followed by
- 2 minutes of speech
I would get two files, one 45 seconds long and one 2 minutes long.
Does such a program allready exists, and if not, what would be the
best/easiest way of doing it?
1: http://www.davee.com/scanrec/
Thanks a lot,
GFK's
--
Guillaume Filion, ing. jr
Logidac Tech., Beaumont, Québec, Canada - http://logidac.com/
PGP Key and more: http://guillaume.filion.org/
Hello Developers,
I'm currently developing an application which should be controlled via
MIDI. I'd like to use the Alsa Sequencer API, so I can use aconnect and
friends to connect my app to other apps and MIDI hardware. However I
like to get access and send the raw MIDI stream. So far I only saw code
which use the snd_seq_event_input() call which already parsed the MIDI
data. Is there another function which lets me access the latest received
MIDI bytes? Or does the snd_seq_event_t struct contain the raw bytes?
--
---> doj / cubic
----> http://cubic.org/~doj
-----> http://llg.cubic.org
Dear wise members of the list.
I am (still) trying to implement a control panel
feature for the U2A USB sound card. I (finally!) have
the alsa patch from Clemens Ladisch up and running -
at least I can compile a small program that when run
squirts of a small control transfer URB to the sound
card without complaints.
Now, half of the URBs sent to the device are
CONTROL_TRANSFER blocks, but the other half are marked
as CLASS_INTERFACE in the SnoopyPro logs. See a
typical example below.
I have googled the net and searched the USB specs
without getting much wiser as to what a
CLASS_INTERFACE request is and does. Can I send it
using CONTROL_TRANSFER URBs or is yet another
extension of the alsa driver necessary ?
Cheers
-- Jan Holst
277 out down n/a 710.461
CLASS_INTERFACE 01
URB Header (length: 80)
SequenceNumber: 277
Function: 001b (CLASS_INTERFACE)
PipeHandle: 00000001
SetupPacket:
0000: 00 01 00 01 00 04 ea 87
bmRequestType: 00
DIR: Host-To-Device
TYPE: Standard
RECIPIENT: Device
bRequest: 01
CLEAR_FEATURE
TransferBuffer: 0x00000001 (1) length
0000: 01
277 out up n/a 710.471 CONTROL_TRANSFER
- 0x00000000
URB Header (length: 80)
SequenceNumber: 277
Function: 0008 (CONTROL_TRANSFER)
PipeHandle: 860fee14
SetupPacket:
0000: 21 01 00 01 00 04 01 00
bmRequestType: 21
DIR: Host-To-Device
TYPE: Class
RECIPIENT: Interface
bRequest: 01
No TransferBuffer
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Hi Guillaume
> I'm a in the process of making a police/EMS/fire radio recorder. ...
> However, I started thinking and found that it would be better to have a
> different file for each segment. For example, if there is
> - 45 seconds of speech, followed by
> - 3 minutes of silence, followed by
> - 2 minutes of speech
> I would get two files, one 45 seconds long and one 2 minutes long.
>
> Does such a program allready exists, and if not, what would be the
> best/easiest way of doing it?
Although it uses the OSS API, you might like to take a look at
batchrec-1.2.0, available in source-form only on my website at
http://www.physics.adelaide.edu.au/~jwoithe
There's no autoconf support, but it shouldn't be difficult to get going on
any modern Linux distro, and is reasonably well documented via the "-h"
command line parameter. It's tested and developed under Slackware.
>From the sound of your description, batchrec will probably do what you want.
The code is a little "quick and dirty" and probably needs tidying up, but it
does the job. It's textmode only at this point mainly because I can't be
bothered writing a GUI for it at the moment. You also get levelmeters to
monitor the level coming in. It's OSS-only because for me it works, does
what I need and I've been short of time in recent months. I have been
toying with the idea of writing a native ALSA and/or jack backend to it, but
that is probably a way off yet.
Anyway, have a look and see if it does what you need. Perhaps contact me
off-list if you have specific followup questions.
Regards
jonathan