Linux-audio-dev October 2005

linux-audio-dev@lists.linuxaudio.org

79 participants
51 discussions

[linux-audio-dev] Re: [linux-audio-user] Edirol FA-66 Working Setup

by Bradley A. Hare

ce wrote: >there was a talk at LAC 2005; AFAIR the latency was 50msecs this time. >I don't know if it is less these days. I believe I am at 10 msec. now - have not pushed it further yet. >are they already working on a true ALSA driver? I believe they are. There is a dev. road map on the sourceforge page. Regards, Brad Hare

18 years, 5 months

[linux-audio-dev] 22050hz mono volume fading

by Ross Levis

It's my first post here. I'm developing an audio player which has a fading up/down facility. This is working fine except for 22050 mono samples. I'm getting patchy loud noises (intermittent white noise?) while fading the audio data up and down. The original audio can also be heard between the noise. The basic equation I'm doing is (Excuse the Pascal syntax): Data := Data * CurrVol / 32767; Data is always 2 bytes of audio data (16 bit data). CurrVol goes from 0 to 32767 or vice versa over several bytes. If I remove this line, there is no noise generated, but obviously no volume change either. The problem only occurs when it's mono 22050 samples. Stereo 22050 samples are fine, and mono 44100 samples are fine. I don't understand why this is happening. Any ideas? Thanks, Ross.

18 years, 5 months

[linux-audio-dev] [ANN] Sineshaper 0.4.0

by Lars Luthman

The Sineshaper is a monophonic DSSI synth. This is the first release. Source tarball, screenshot and Vorbis demo are available here: http://ll-plugins.sf.net. The knob graphics are created by Thorsten Wilms and Peter Shorthose. The Sineshaper synth has two sine oscillators and two waveshapers. The sound from the two oscillators is mixed and passed through the waveshapers, first through the first waveshaper and then the second. You can control the tuning of both oscillators as well as their relative loudness, and the total amount of shaping and the fraction of that amount that each shaper applies. Both waveshapers use a sine function for shaping the sound, but for the second shaper you can shift the sine function (with maximal shift it becomes a cosine function) to produce a different sound. You can also add vibrato and tremolo, and change the ADSR envelope that controls the amplitude and shape amount (as well as setting the envelope sensitivity for both the amplifier and the shapers). There is also a "Drive" control that adds distorsion, and a feedback delay with controllable delay time and feedback amount. All control parameters can be changed using MIDI. The Sineshaper synth comes with some presets that you can play or use as starting points for your own synth settings. You can not change these "factory presets", but you can create and save your own presets. They are written to the file .sineshaperpresets in your home directory. If you make any nice presets I would really like to hear them. -- Lars Luthman PGP key: http://www.d.kth.se/~d00-llu/pgp_key.php Fingerprint: FCA7 C790 19B9 322D EB7A E1B3 4371 4650 04C7 7E2E

18 years, 5 months

Re: [linux-audio-dev] Edirol FA-101

by Dmitry S. Baikov

> Are you using a customized jackd? What version? What command line? Do > you have any evidence that anyone has ever made this work? > Opps, sorry for skipping obviously needed details. Was really upset. I tried freebob + jackd from freebob.sf.net. libavc from svn, libiec61883 1.0, libraw1394 1.2 cmdline: jackd -d iec61883 -o osc.udp://localhost:31000 FreeBoB wiki's list of working setups contains FA-101 + gentoo (my distro). When run in the first time, jackd starts, but there's no sound, and seems processing callbacks aren't called (no interrupts?). Dmitry.

18 years, 5 months

[linux-audio-dev] Transport Regions

by Thorsten Wilms

Hi! I have been thinking about combining sequencing, (live) looping and sampling. I call the concept I arrived at Transport Regions for now (might call it Areas, Scopes, Frames ... a native speaker's take on this?). A Transport Regions groups n tracks, defining a common playback posistion and transport state (playing, paused, reverse ...). Loops can be defined with Markers. A 'classic' sequencer/daw project would use only 1 Region, but having several could allow sooperlooper like action, with the advantage of simple extension, moving on from jamming to production. Transport commands to specific Regions could be recorded and played back themselves. Instrument type samples could be treated the same, with the known markers, just for rather short loops, provided transport actions could be mapped to midi/notes. Multisampling would require means to map (midi) parameters to track level changes and/or soloing/muting. Patterns could actualy be Transport Regions triggered from a track, from which they would need to 'inherit' tempo for normal operation. Well ... just food for thought! --- Thorsten Wilms

18 years, 5 months

[linux-audio-dev] Edirol FA-101

by Dmitry Baikov

Hello! Recently got FA-101. But can't get it to work. Jackd log is below. Thank you in advance. Regards, Dmitry. ---- JACK compiled with System V SHM support. loading driver .. IEC61883: Using FreeBobCtl lib version 0.0.1 (Build Oct 20 2005 - 01:33:14) Reading from OSC URL: osc.udp://localhost:31000 requesting channel info from osc.udp://localhost:31000 adding generic handler... adding /reponse handler... parsing address... sending request... waiting for response... ok freeing... done... ConnectionInfo contains 1 connection_specs IEC61883: Adding 1 capture connection(s)... IEC61883: capture connection 0: 0 streams, dim 0 from (0,11,11) IEC61883: adding stream 0: (1,1) 0x06 0x02 -> 0 (MicIn1 l) IEC61883: adding stream 1: (6,2) 0x06 0x02 -> 0 (MicIn1 right) IEC61883: adding stream 2: (2,1) 0x06 0x03 -> 0 (LineIn 3&4 l) IEC61883: adding stream 3: (7,2) 0x06 0x03 -> 0 (LineIn 3&4 right) IEC61883: adding stream 4: (3,1) 0x06 0x03 -> 0 (LineIn 5&6 l) IEC61883: adding stream 5: (8,2) 0x06 0x03 -> 0 (LineIn 5&6 right) IEC61883: adding stream 6: (4,1) 0x06 0x03 -> 0 (LineIn 7&8 l) IEC61883: adding stream 7: (9,2) 0x06 0x03 -> 0 (LineIn 7&8 right) IEC61883: adding stream 8: (0,1) 0x06 0x04 -> 0 (SpdifIn left) IEC61883: adding stream 9: (5,2) 0x06 0x04 -> 0 (SpdifIn righ) IEC61883: adding stream 10: (10,1) 0x0D 0x0A -> 0 (MidiPort) requesting channel info from osc.udp://localhost:31000 adding generic handler... adding /reponse handler... parsing address... sending request... waiting for response... ok freeing... done... ConnectionInfo contains 1 connection_specs IEC61883: Adding 1 playback connection(s)... IEC61883: playback connection 0: 0 streams, dim 0 to (0,11,11) IEC61883: adding stream 0: (1,1) 0x06 0x03 -> 0 (LineOut 1&2 left) IEC61883: adding stream 1: (6,2) 0x06 0x03 -> 0 (LineOut 1&2 righ) IEC61883: adding stream 2: (2,1) 0x06 0x03 -> 0 (LineOut 3&4 left) IEC61883: adding stream 3: (7,2) 0x06 0x03 -> 0 (LineOut 3&4 righ) IEC61883: adding stream 4: (3,1) 0x06 0x03 -> 0 (LineOut 5&6 left) IEC61883: adding stream 5: (8,2) 0x06 0x03 -> 0 (LineOut 5&6 righ) IEC61883: adding stream 6: (4,1) 0x06 0x03 -> 0 (LineOut 7&8 left) IEC61883: adding stream 7: (9,2) 0x06 0x03 -> 0 (LineOut 7&8 righ) IEC61883: adding stream 8: (0,1) 0x06 0x04 -> 0 (SpdifOut lef) IEC61883: adding stream 9: (5,2) 0x06 0x04 -> 0 (SpdifOut rig) IEC61883: adding stream 10: (10,1) 0x0D 0x0A -> 0 (MidiPort) IEC61883D: Creating driver (period_size=256, ringbuffer_size=8192) Creating IEC61883 client... 256/8192/48000 poll timeout = 5 ms Creating 11 buffers of 8192 quadlets... IEC61883C: Creating playback connection from node 65472, plug 0 prebuffers=0, buffers=300, irq_interval=100 Creating 11 buffers of 8192 quadlets... IEC61883 Client created... Initializing OSC debug & statistics server... port 31001 OK Starting OSC debug & statistics server... OK IEC61883CM: registered jack port cap_0_0_0_MicIn1 l IEC61883CM: registered jack port cap_0_0_0_MicIn1 right IEC61883CM: registered jack port cap_0_0_0_LineIn 3&4 l IEC61883CM: registered jack port cap_0_0_0_LineIn 3&4 right IEC61883CM: registered jack port cap_0_0_0_LineIn 5&6 l IEC61883CM: registered jack port cap_0_0_0_LineIn 5&6 right IEC61883CM: registered jack port cap_0_0_0_LineIn 7&8 l IEC61883CM: registered jack port cap_0_0_0_LineIn 7&8 right IEC61883CM: registered jack port cap_0_0_0_SpdifIn left IEC61883CM: registered jack port cap_0_0_0_SpdifIn righ IEC61883CM: registered midi port MidiIn_0_0_0_MidiPort_1 as 128:0 IEC61883CM: registered jack port pbk_0_0_0_LineOut 1&2 left IEC61883CM: registered jack port pbk_0_0_0_LineOut 1&2 righ IEC61883CM: registered jack port pbk_0_0_0_LineOut 3&4 left IEC61883CM: registered jack port pbk_0_0_0_LineOut 3&4 righ IEC61883CM: registered jack port pbk_0_0_0_LineOut 5&6 left IEC61883CM: registered jack port pbk_0_0_0_LineOut 5&6 righ IEC61883CM: registered jack port pbk_0_0_0_LineOut 7&8 left IEC61883CM: registered jack port pbk_0_0_0_LineOut 7&8 righ IEC61883CM: registered jack port pbk_0_0_0_SpdifOut lef IEC61883CM: registered jack port pbk_0_0_0_SpdifOut rig IEC61883CM: registered midi port MidiOut_0_0_0_MidiPort_1 as 128:1 Client start... creating capture connections... libiec61883 warning: iec61883_cmp_create_p2p_output: Failed to set the oPCR[0] plug f or node 0. Init ISO master receive handler on channel -1... (BUFFER=300,PACKET_MAX=2048 ,IRQ=100)... Start ISO master receive... IEC61883C: couldn't start receiving: Invalid argument DRIVER NT: could not start driver cannot start driver

18 years, 5 months

Re: [linux-audio-user] Re: [linux-audio-dev] Edirol FA-101

by Lee Revell

On Fri, 2005-10-21 at 14:48 -0700, Mark Knecht wrote: > > I think this would be a better question for the Freebob list, and cc: > > the jackit-devel list, as you're using a version of JACK that the > > Freebob people have customized. I've never heard anyone on LAD or LAU > > report that this works. > > > > First and foremost, we need to get the iec61883 driver into JACK CVS, so > > that Paul Davis and the other JACK experts can help you. > > > > Lee > > In case some folks don't know this stuff iec61883 is part of the 1394 > stack. Why would it go into Jack CVS? Sorry, I mean "the iec61883 backend". JACK used to call these "drivers" but as you can see it's confusing. JACK does not need to include the iec61883 stack but it does need to know how to talk to it, just like with ALSA, OSS, etc. Look at his command line: jackd -d iec61883 -o osc.udp://localhost:31000 If I run this I get: rlrevell@mindpipe:~/kernel-source/linux-2.6.13$ jackd -d iec61883 jackd: unknown driver 'iec61883' So he must be using a third party patch to jackd from the Freebob people that implements the 'iec61883' backend. Lee

18 years, 5 months

[linux-audio-dev] Old tracks finaly recorded and mastered

by Thorsten Wilms

Hi! Finaly got around to record a number of old tracks that I created using nothing but a GEM S3 keyboard in 1997/98 (well, and my brother's PC for selecting samples and putting them on a floppy for importing). Previoulsy they only existed on floppy and tape and one floppy is corrupted already ... Still in the process of loading them up to archive.org, but some are there by now: In order of my own rating, best at the top: http://www.archive.org/download/s3_07_the_darkness_surrounding_me/thorwil_s… http://www.archive.org/download/s3_06_multibeatmode/thorwil_s3_06_multibeat… http://www.archive.org/download/s3_05_leaving_it_all_behind/thorwil_s3_05_l… http://www.archive.org/download/s3_04_red_sun/thorwil_s3_04_red_sun.ogg http://www.archive.org/download/s3_02_rave_scales/thorwil_s3_02_rave_scales… http://www.archive.org/download/s3_03_blue_beat/thorwil_s3_03_blue_beat.ogg http://www.archive.org/download/s3_08_where_do_i_want_to_go_today/thorwil_s… The detail pages can be reached from here: http://www.archive.org/search.php?query=creator%3A%22Thorsten%20Wilms%22 I wouldn't mind people writing reviews there ;) All recorded using the focused Timemachine. Cutting and normalizing with the most enjoyable Sweep. Mastering with the amazing Jamin. Need to practice that some more :). I wasn't aware of how much details can be brought to light using compression. The only problem was having to convert the 32bit float WAVs to 16 bit for lame, as it doesn't recognize that format. I used sndfile-convert for that. Too bad it doesn't take a flag for the output format, but requires filenames for that. But thanks to the nice folks at #lad, it didn't take long to arrive at a bash oneliner for converting a whole directoy. --- Thorsten Wilms

18 years, 5 months

[linux-audio-dev] Re: snd-usb-usx2y on amd64? - Success (more or less)

by Arnold Krille

Hi all, just a note: A got it more or less working. This morning I installed the vanilla-2.6.14-rc4 and I could start jackd in realtime with -n6 -p256 and run ardour and qsampler/linuxsampler in parallel without an xrun during normal operation. It just crashed jackd when I used -n6 -p128 but even after that it didn't ruin the sounddriver so I could start jackd again. That really takes a big stone from my heart as I have to do some serious music with the laptop this weekend and I feared I had to mess around with my old one... So thanks for your patience, Arnold -- visit http://dillenburg.dyndns.org/~arnold/ --- Wenn man mit Raubkopien Bands wie Brosis oder Britney Spears wirklich verhindern könnte, würde ich mir noch heute einen Stapel Brenner und einen Sack Rohlinge kaufen.

18 years, 6 months

[linux-audio-dev] Fixed vs. floating point

by cpolymeris＠gmx.net

I am in the early planning stage of an audio processing application and I have come to the point of making the choice between floating point or fixed point (signed 2's complement) processing. What do you think is better, and why? Why does jack use floating point? Why does AES use fixed point in most of their standards? I understand the technical difference between the formats, but... I can't come to a conclussion. The adavantages of floating point I see are: - easier processing, specially amplification and mixing (multiplying by fractions) - more sse support, more packed array arithmetics - relationship to voltage and SPL easier to understand. (1.0f vs. 2^31-1 max. values) And its diadvantages compared to fixed point would be: - generally slower, specially things like addition - 30 bits of resolution for 32 bits of data in IEEE single-precision (exponents larger than 0 not used for audio, neither are denormalized numbers and redundant zeroes, infinities, etc), compared to the full 32 bits of resolution of fixed point. - non-linear saw-tooth-like precission (precission gets higher as mantissa gets larger and then falls abruptly at the point the exponent is increased) I am sure I fail to see the more important points and would be thankful for any comments. If it has been discussed on the list earlier, i am sorry to post it again. I couldn't find it. Greetigs, Dimitri -- NEU: Telefon-Flatrate f�rs dt. Festnetz! GMX Phone_Flat: 9,99 Euro/Mon.* F�r DSL-Nutzer. Ohne Providerwechsel! http://www.gmx.net/de/go/telefonie

18 years, 6 months

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Linux-audio-dev October 2005