Linux-audio-user January 2010

linux-audio-user@lists.linuxaudio.org

166 participants
153 discussions

by Jeremy

Hello all, Just a short introduction mail. My name is Jeremy, I've been making music for over 20 years, alone and in bands, as a guitarist and singer. I've been using Linux on and off since the late '90's until 3 years ago when Linux reached it's turning point for me: everything that I wanted to do could be done with Linux. From that moment on I've been using Linux exclusively. The fact that I'm a Linux sysadmin at the University of Amsterdam helps also ;) And now it's starting to converge: making music on the one hand and tweaking and nerding on the other. And I like it. Hopefully my contributions to this list can be of use, either from a musician's point of view, or from an enduser's point of view. I'm not a programmer/coder but I do know my way around so I may be able to participate in a collaborative way when it comes to more technical issues. That's it actually. Oh yeah, I'm a kind guy, I wouldn't "harm a fly" (Dutch proverb), but I won't avoid any criticism and I can be a wee bit cynical every now and then. And I'm a music lover and a bit of a walking encyclopedia of modern rock and pop music. When someone mentions Djed from Tortoise I already get tensed up ;) Best, Jeremy http://linux.autostatic.com

15 years, 2 months

oh yoshimi, one more time

by cal

For better or worse, there's an 0.053-pre3 on <http://www.graggrag.com/?q=yoshimi>. The settings corruption seems fixed, and some stray chaos from the recorder reorg seems to be under control. In the vague hope that it might help when I stuff things up, I've put up an 0.053-pre2-0.053-pre3.diff as well. cheers, Cal

15 years, 2 months

[Absolutely OT] - for musicians only

by fons＠kokkinizita.net

Hello musicians, Pink Floyd's 'Atom Heart Mother' ends with two repetitions of the main theme, with full choir, brass and everything. The bass is: E G F C, E G F C, E G A B, E G F# ?????, E G F C etc. It's the F# ????? - the surprising modulation just before the theme repeats - that I'm after. Most PF harmony is quite straightforward but this one defeats me... Anyone knows this chord progression ? TIA, -- FA

15 years, 2 months

Ascension: Music made in Linux

by Patrick Shirkey

Hi, I had some fun with alsamodularsynth over the weekend and managed to get about 10 hours of recordings into ardour. I have now got about 10 complete tracks and probably 20 more if I edit, cut, and mix. Before I do the latter I am going to clean up the 10 tracks that I feel don't require editing. Before I do that though I am interested to hear what people who have better/different equipment to me think of the quality of the raw cuts. So, I have uploaded a new track to my server. http://djcj.org/audio/kotau/ascension/ascension_unity.ogg size: 112MB (about an hour long) If you have the time to download it and give me some feedback on what you think needs to be done to the levels to bring out the sound and make it really crisp I would appreciate your feedback. This particular track I consider to be in the Tech House genre. If that is the kind of sound you are into or if you just want to hear some of my synthesis experiments then I think you will enjoy the track even without any processing to sharpen up the soundscape. The level is consistent throughout the track. There are no spikes so I'm pretty sure there are no nasty surprises. Obviously it is designed to be played at volume in a club type setting so please keep that in mind. You may want to adjust the high and middle end in order to bring out the intensity of the low end at high volume. For these tracks I am not going to do any editing. It will simple be a case of selecting a section that starts and ends nicely and then processing it with whatever people here suggest to brighten up or otherwise bring out the sounds that have been captured. FWIW, I'm already really happy with the recordings I got. I have managed to capture a selection of house, tech, break, dnb, dub, ambient and bits and bleeps. In fact a couple of the tracks even sound like a 4 piece rock band and a live drummer are playing on them. I have been entirely surprised by the amount of variation in the rhythms, melodies and patterns that I was able to get out of ams during this session. It's amazing what can be accomplished sitting in front of a powerful Linux audio workstation for 48 hours straight when your in the right mood :-) Enjoy and I look forward to your feedback. I hope y'all will get as much of a kick out of hearing some of these sounds as I have while bringing them forth. Cheers. -- Patrick Shirkey Boost Hardware Ltd

15 years, 2 months

Re: [LAU] [Absolutely OT] - for musicians only

by frank pirrone

fons(a)kokkinizita.net wrote: > On Wed, Jan 13, 2010 at 05:53:10PM -0500, frank pirrone wrote: > > >> Wouldn't that be in the key of E, Fons? If so the F# is the II chord, >> which would typically resolve to the IV, or B7 in that key. That >> wouldn't be a modulation, it would be a "turn-around," and especially so >> since the progression continues on with another E. >> Fons, Oops on that IV typo - I actually learned to count to five a long time ago. That little progression fragment I cited should have been II V resolving back to I. Anyway, the chord structure for that entire song file you sent are: Em Em G G F F C C Em Em G G F F C C Em Em G G A A B B Em Em G G F#7 G Em Bb B7 F#7 B7 G Em Em G G F F C C Em Em G G F F C C Em Em G G A A B B Em Em G G F F F F F F F F F/E F/E F/E F/E F/E F/E F/E F/E F/E F/E F/E F/E E E E E E E E E E E E E with each line being a 4/4 measure and each chord being struck on the beat, or in the case of those doubled up at least struck the first time and held for the second. I'm pretty sure of everything through the Fs at the end, and believe I hear the bass drop into the dissonance of that add E against the F chord before the whole thing resolves triumphally to that glorious E major at close. Frank

15 years, 2 months

Re: [LAU] (right) Ascension and Declination

by frank pirrone

I don't listen to this kind of exploratory music, and the varieties/genres mentioned are largely foreign to my experience, but I did have an ARP Odyssey once that was the source of much amusement and delight. I'd set up a sample-and-hold and mess with the LFO and envelope modulation, and then grab my guitar or keyboard, jamming along...and, yes you'd have enjoyed both the music I made and some of what I was smoking. Anyway, there is definite coolness in this stuff, both pieces. It strikes me that what makes this music and not noise is the harmonic and rhythmic structure, however tenuous and demanding. One of the things I'm hearing, and I'll address this more to Patrick's piece, is a sense of shifting patterns. It's like my explorations on hand drums where I'll start out a rhythm, and as I get lost in it, experience a drift in its structure where accents and groupings shift, almost in a tromp l'oeil fashion. Foreground flips with background, lights become darks, repetition alternates between hands, patterns invert, etc. I'm hearing the same thing happening here, and if you either concentrate or abandon all concentration you will hear micro and macro structures emerge from this music. Another example, or even metaphor if you will, is the stroboscopic phenomenon involved in rotating objects where the velocity and direction of movement appear to change as you watch. So, Patrick, a suggestion as to what you might do with Ascension, is take any of a number of filters, and looking at the patterns suggested by the waveforms, draw envelope automation lines to emphasize and enhance them. You can do this with multiple tracks and effects, which would draw out of this work its inherent structure as well as maximizing this "tromp l'oreille" experience. You could do this with modulation effects such as phasing and flanging, EQ changes, amplitude and panning, compression, etc. After layering on several patterns, you might have something of real complexity and interest. The interplay could be hypnotic. It should also be practical to do this even with an hour-long piece by simply following the frequency and amplitude changes in the wave form. Of course, if you've got the time and motivation, you could also listen carefully, and work your editing with intention in sync with the actual voice of the piece. Frank

15 years, 2 months

Re: [LAU] [FFADO-user] trying to get an Echo AudioFire12 running

by Scott

nescivi wrote: > Hi Joern, > > how are you! > > On Saturday 30 January 2010 15:17:40 Jörn Nettingsmeier wrote: >> On 01/30/2010 07:45 AM, nescivi wrote: >>> Hiho, >>> >>> I'm getting this error at startup with QJackCtl: >>> >>> 02064605304: (ffado.cpp)[ 92] ffado_streaming_init: libffado 1.999.43 >>> built Jun 27 2009 18:38:47 >>> 02064832606: [31mWarning (fireworks_session_block.cpp)[ 257] >>> loadFromMemory: size not correct: got 13392, should be -4 according to >>> data >>> >>> and after a while it just crashes jackd. >> i don't know the hardware, and i have no idea of ffado internals, but if >> a size is expected to be "minus four" according to some "data", i'm >> willing to bet vast amounts of money soaked in expensive red wine that >> there is something wrong with the "data". >> >> maybe it's related to the configuration data? can you check >> /usr/lib/libffado/configuration for something obviously bogus about your >> hardware? but that's just a shot in the dark. > > Doesn't seem obviously bogus to me (see below), but then again, who am > I :) > Output is below. > > I also just managed to update my system to the latest ffado and jack > that's in > Debian unstable, and still get the same error. > > Are there any specific jack settings I should try? > Right now what QJackCtl is using is: > /usr/bin/jackd -R -p128 -t200 -dfirewire -r48000 -p1024 -n3 > > > sincerely, > Marije > > > > $ cat /usr/share/libffado2/configuration > > device_definitions = ( > <snip> > { > vendorid = 0x1486; > modelid = 0xAF2; > vendorname = "Echo"; > modelname = "AudioFire2"; > driver = 2; > mixer = "AudioFireMixer"; > xmit_max_cycles_early_transmit = 2; > }, > { > vendorid = 0x1486; > modelid = 0xAF4; > vendorname = "Echo"; > modelname = "AudioFire4"; > driver = 2; > mixer = "AudioFireMixer"; > xmit_max_cycles_early_transmit = 2; > }, > { > vendorid = 0x1486; > modelid = 0xAF8; > vendorname = "Echo"; > modelname = "AudioFire8"; > driver = 2; > mixer = "AudioFireMixer"; > xmit_max_cycles_early_transmit = 2; > }, > { > vendorid = 0x1486; > modelid = 0xAF12; > vendorname = "Echo"; > modelname = "AudioFire12"; > driver = 2; > mixer = "AudioFireMixer"; > xmit_max_cycles_early_transmit = 2; > }, > { > vendorid = 0x1486; > modelid = 0xAF12D; > vendorname = "Echo"; > modelname = "AudioFire12HD"; > driver = 2; > xmit_max_cycles_early_transmit = 2; > } > <snip> For reference, here's my relevant libffado configuration: $ cat /usr/share/libffado/configuration <snip> { vendorid = 0x1486; modelid = 0xAF12; vendorname = "Echo"; modelname = "AudioFire12"; driver = 2; mixer = "AudioFireMixer"; }, { vendorid = 0x1486; modelid = 0xAF12D; vendorname = "Echo"; modelname = "AudioFire12HD"; driver = 2; }, <snap> I have an AudioFire12. I've never heard of an AudioFire12HD. -Scott

15 years, 2 months

oh yoshimi, one more time

by David Adler

I posted this to the wrong list first, thus now forwarding to LAU. ---------- Forwarded message ---------- From: David Adler Date: Sat, Jan 30, 2010 at 9:18 AM Subject: Re: [LAU] oh yoshimi, one more time To: yoshimi-user(a)lists.sourceforge.net david wrote: > Folderol wrote: >> david wrote: >>> Folderol wrote: >>>> Emanuel Rumpf wrote: >>>>> I don't know if this is known: >>>>> Yoshimi 054 pre2 and pre4 both disconnect from jack, when pressing >>>>> many keys (~10) at the same time on my midi keyboard. >>>>> This does not happen with yoshimi 038 >>>>> >>>> Cant repeat that here. Are you using jack-midi or alsa-midi? I'm using >>>> alsa-midi. >>>> I can stick both arms down flat across the keyboard without it >>>> disconnecting - get rather a lot of xruns though! >>> Hmmm, I've noticed that if I have a lot of notes going (play fast scales >>> with sustain pedal down), adding new notes will cut off existing ones. >> >> That's normal behaviour and dependent on the number of notes of >> polyphony set at compile time ( haven't a clue what the default is) and >> the release time of the notes. > > Yoshimi is set for 256, I think that's the default. > >>> Last night I was playing something into Rosegarden, and noticed that >>> sometimes a run of notes simply wouldn't happen - appear in Rosegarden >>> or play through Yoshimi. >> >> If they don't even appear in Rosegarden then I wonder if you've got >> MIDI set up correctly. Is it a USB keyboard? I believe they are >> inclined to have latency problems and you might just be overfilling the >> 'pipe' :o > > It's a MIDI keyboard (Yamaha PSR225GM) without USB capability. The > XMidiPort provides 2 standard MIDI cables at one end and a standard USB > connector at the other. It is connected into a USB hub that has a number > of other things connected to it (none in active use). > >>> I didn't get any xruns, and didn't see any messages from JACK about any >>> problems. >>> >>> Using JACKDMP using alsa-midi (E-Mu XMidiPort 1x1 over USB 2 port and an >>> external USB sound card hooked to a different USB port). Yoshimi 0.053.2. >> >> Looks even more like a straight MIDI problem. > > I'll have to try it without Yoshi running. > I just did some 'play many notes'-testing with yoshimi 0.053.3 and 0.053-pre4 and Ohh Choir.xiz. Without sustain: The first note is dropped as soon as I press the 16th one. yoshimi continuously reacts on new notes. With sustain (or long release time): The 8th to 16th note. (depending on ? and the patch used) When playing fast, yoshimi reports 'to many notes' and refuses to react on new notes until calmed down. This might not be yoshimis fault, as it happens even with the default sine wave at << 10 % cpu usage. OTOH, when playing Aeolus in the same way (via USB -> seq driver -> Jack MIDI) this limit does not exist. No xruns appeared during the above tests, so I tried teasing a little more. 'Ohh Choir.xiz', without sustain: -p 3 -n 64 (not used for real work) Pressing many notes, hundreds of xruns appear at ~ 50% cpu usage (as reported by qjackctl). -p 3 -n 128 No xruns at all. When repeatedly pressing as many, many notes as possible with my arms, the 'to many notes' messages appear again, yoshimi interrupts response on new notes for a while (as above). I added some SUBsynth and ADDsynth to the choir pad and was able to zombify yoshimi 0.053.3 at about 80% cpu usage. Still no xrun. All this with an E-MU 0202 USB and a non-rt kernel, quite pleasant. best, d

15 years, 2 months

LAC2010: Clarification on paper deadline

by Frank Neumann

Hi, since the webpage for the Linux Audio Conference 2010(*) was unclear on the deadline for paper submissions, please let me clarify this here: The deadline for _paper submissions_ is February 14th, 2010. Until yesterday, the webpage incorrectly mentioned "Call for Abstracts", which should have read "Call for Papers" instead. This has been corrected now. Additionally, some information about the desired size and other constraints for paper submissions has been added to the web page mentioned below. Please feel free to forward this mail to whatever people/mailing lists are suitable. Sorry for the trouble, Frank, on behalf of the LAC2010 organization team (*) http://lac.linuxaudio.org/2010/?page=participation

15 years, 2 months

audio function generator ?

by Dave Phillips

Greetings, A respondent to my latest article for LJ has asked if I can recommend an audio function generator for Linux. He's using a command-line app now, but he'd like to know if there's such an app with a GUI. Any suggestions ? Best, dp

15 years, 2 months

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Linux-audio-user January 2010