List,
I've created a Wiki page with my findings of using real-time,
low-latency audio on the RPi: http://wiki.linuxaudio.org/wiki/raspberrypi
It's not complete and the RPi needs some more hacking to squeeze out the
last bits of processing power that can be dedicated to things like
samplers, synths, effects and guitar amp emulators.
Thought I'd share the link, saw some questions regarding the RPi pass by
the last few months. To show off what the RPi is capable of:
http://www.youtube.com/watch?v=u6XKaRe_MEA&webm=1 (if you still use
Flash remove '&webm=1')
Regards,
Jeremy
On 03/30/2013 09:01 AM, Simon Wise wrote:
> On 30/03/13 05:35, rosea.grammostola wrote:
>
>>
>> The bcr2000 has rotary encoders with LEDS.
>>
>> The bitstream 3X does have potentiometers and it's possible to set the
>> 3X in
>> such a way that the know has to pass the value of an control in a certain
>> software, before it gets 'on'.
>
> I find the need to move the knob (or a fader) to pick-up the value as above
> very clumsy in many circumstances ... especially when fine tuning
> something it is difficult to make the first small adjustment, and
> requires finding the target
> value first from the computer screen etc. Its OK if you have enough
> knobs so that you can control most things you want to without switching.
The Bitstream 3X has two modes, which should prevent undesirable jumps:
Jump mode:
allows the instantaneous sending of MIDI data no matter what position
the control is in at the time of the change.
This mode could provoke undesirable jumps in the values when the user
uses the different groups of the Bitstream 3X, the physical value of the
control may not correspond to the value of the same control in a new group.
Hook mode:
allows the user to avoid any undesirable jump in values: After any group
change, if the physical position of the analog control doesn’t
correspond to the value of the same control in the newly
selected group, the MIDI data is not sent while the physical position
and the value are different. Thus, no jump in value is obtained.
The LCD screen of the Bitstream 3X indicates the direction to move the
control to finally generate the MIDI.
They want to make the firmware and software open source btw (all though
that thread may be old, it's still their plan to do so):
http://www.waveidea.com/en/support/phpBB3/viewtopic.php?f=14&t=1001&start=15
\r
I'm trying to run jackd from a script that is triggered by udev. But
when I try to do so jackd complains:
jackd 0.122.0
...
JACK is running in realtime mode, but you are not allowed to use
realtime scheduling.
...
But the user trying to run jackd (pi) is a member of the audio group.
The udev rule looks like this:
ATTRS{idVendor}=="0218", ATTRS{idProduct}=="0001", ACTION=="change",
RUN+="/usr/bin/sudo -u pi -s /home/pi/bin/drumpad"
Is this maybe related to using sudo? I'd like to get this working, the
idea is that whenever I plug in my drumpad the udev rule and thus the
script gets executed. The script checks if jackd is already started and
then moves on starting up jalv with the drumkv1 plug-in. The script
itself works fine, it's just the udev part that got me puzzled.
Thanks!
Jeremy
Hello everyone!
So I had a holiday in paradise. Meaning: I was surrounded by a very good
friend, loads of vintage equipment and Ardour3. And I am grateful for all
three. So I used a few minutes to record another piece of Bach. It's the B
Minor prelude (once again) played on an ARP Pro Soloist (trumpet) and an ARP
Oddysey. Unfortunately I had to spread my arms to the left and right playing
the piece. So the performance is not as good, as you might wish. Still it was
an experience I loved and so I'm sharing, hoping that a few gear nerds might
get something out of it.
http://juliencoder.de/bach/BWV869A-Prelude_in_B_Minor-Synth_Version.ogg
And for the ogg-less (poor bastards :-) )
http://juliencoder.de/bach/BWV869A-Prelude_in_B_Minor-Synth_Version.mp3
Processing consists of some high and lowpass filtering, using the GLAME
filters, the TAP stereo echo of the Oddy and the CAPS Plate reverb 2x2 for teh
Pro Soloist.
Any feedback is welcome. I hope you can enjoy it.
Warmly yours
Julien
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http://juliencoder.de/nama/music.html
Greetings,
I have an old track that needs brightened up a bit. It was recorded on a
mixing board cassette deck (I said it was old, didn't I ?), a direct
feed I think, and the sound quality is, shall we say, unlovely.
So how do I deal with such material ? Is an exciter useful in this
scenario ? Or ... ?
Anyone who wants to take a swing at it, here 'tis :
http://linux-sound.org/audio/Whiter_Shade_Of_Pale.flac
Recorded at a local festival, probably some time in the late 80s.
Best,
dp
Probably well known to most LAU subscribers, but some amazingly
well crafted songs provided over the years with OpenBSD releases.
Great artwork and lyrics too:
http://www.openbsd.org/lyrics.html
--
John.
I finally got around to zipping up and releasing my chiptune
accompaniment software that I debuted at San Mateo Maker Faire 2012.
It's called Chip-o-Matic and it runs off Pure Data. I figured it'd be
of interest to people on this list. Plus, it comes with a small
document that talks about the history of chiptunes and how they work.
Basically, you load it up in Pure Data, and then you can set the beat
pattern/arpeg speed/tempo, choose the bass note with the lower octave,
play arpeggios with the middle octaves, and play leads with the top
octave.
It can be gotten at http://extentofthejam.com/Chip-o-Matic-1.0.tar.gz
And here's a small thrown-together sample of me noodling with it:
http://www.extentofthejam.com/ChipQuickie.mp3
Happy Valentine's Day, everyone!
Louis
Hi,
I do have what I consider as a big problem with MP3 encoding, and that
is artifacts and degenerated sound quality. End results are things like
stronger esses, more "noise" (IE. something like schhhhhh upper
overtones on disted guitars) and a loss of clarity. The thing is that a
finished 320 kbps MP3 should not sound (significant) different than an
original wave file IMO. Note that this artifacts are usually quite
subtle, but very audible for the person(s) that recorded it and the mixer.
I usually do mixes in 24/44.1 and I'm using dithering when exporting to
a 16-bit stereo file. The artifacts, especially stronger esses are more
audible without dithering and it should really not matter.
I'm using Mixbus (Ardour) for exporting the wav files to 16-bit waves
and Audacity for converting the file to a MP3. If I upload a lossless
file to soundcloud, then the same problem comes there when Soundcloud
converts it to it's player.
Unfortunately, I don't have a raw 24/44.1 file and a MP3 I legally can
post right now. But I hope that someone have suggestions about how to
make the best possible MP3 files from a wave file. :-)
Thanks,
Jostein
Hello all,
I am giving Ardour 3 a try. This is a wonderful piece of software.
I just note the following problem: I create a studio under Claudia, add
Ardour as an app, and then just try to record midi data from my keyboard
on a midi track named 'Synth'.
The clip does appear and I can see the notes getting drawed on the
track, but in the end I get the following message:
[ERROR]: cannot open MIDI file
/home/user/ladish-projects/Ardour3_7174/interchange/Ardour3_7174/midifiles/Synth-1.mid
for write
and the clip disappears.
The midifile directory does exist but the correct path is:
/home/user/ladish-projects/Ardour3_7174/interchange/Ardour3/midifiles/
I don't know is the directory is created by Ardour, or Claudia or
Ladish. But it may also be that I am doing something wrong. I tried to
redefine the file locations in the Session>Properties but this did not
solve the problem.
Any idea?
Thanks in advance,
Yvonnick
Hello everyone!
I know, no longer strictly on topic. but the wealth of information is too
much, so I'm asking those who know.
I'm looking for an A/D converter, more precisely a converter from analog ins
to ADAT out. I've seen the Q-ADAT, which sounds almost reasonable. I've also
seen the ADA8000. But frankly both seem a bit much. I mean that literally "a
bit". any cheaper alternative known or anyone here, wants to seel their old
analog to ADAT converter?
Thanks for any advise!
Warm regards
Julien
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http://juliencoder.de/nama/music.html
