Linux-audio-dev

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7517 discussions

[linux-audio-dev] Re: [linux-audio-announce] Announce: Vstserver, vstlib, vstladspa and k_vst~

by Robert Jonsson

Woah! Tack Kjetil! I've been meaning to construct something like this for a veery long time, I'm sincerely happy that you managed to pull it of! Sometime in the near/distant/close/far future I'll be able to test this (I'm not holding my breath), I can't wait! So...next step would be VST synths, any chance you would pursue that? :) Thanks again, Robert (now I can concentrate my -100% freetime on my other 101 projects ;-) Kjetil S. Matheussen wrote: > VSTServer V0.0.1. > ----------------- > First release. Beta, but usable. > > > ABOUT > > Vstserver is a wine program that must be running when using programs > using vstlib. > > Vstlib is a library that can be used by programs to run windows > vst audio plugins under linux/freebsd/i386solaris/etc. > > > RUNNING > Vstserver is started like this: "wine vstserver.so". > You probably want to set the "VST_PATH" environment variable pointing > to your plugins first. > > > DEVELOPMENT > Vstserver is released under the GPL, and vstlib under LGPL. > If there comes many source-contributions, I will probably make it > a sourceforge project. To use vstlib in a program, look at > the tests/exampleclient program, and various vst plug-in documentation. > The interface to the vstlib consists only of two functions (new/delete), > the rest is like you would do when programming for windows, macos(X), > beos, irix, etc. > > > CURRENT STATUS > Vstserver seems to be very stable. I have not found any plug-ins > that wont run, and I am not able to hear any latency. And plug-ins does not > seem to cause more cpu-power than under windows. > No GUI or graphics-support yet. > > > BUGS > 1. When running the ladspa "listplugins" program many times in a row, > I get the following errors before the server freeze: > > err:local:LOCAL_GetBlock not enough space in GDI heap 01f7 for 24 bytes > err:region:CombineRgn Invalid rgn=0000 > err:local:LOCAL_GetBlock not enough space in GDI heap 01f7 for 24 bytes > err:region:CombineRgn Invalid rgn=0000 > err:local:LOCAL_GetBlock not enough space in GDI heap 01f7 for 24 bytes > err:region:CombineRgn Invalid rgn=0000 > err:local:LOCAL_GetBlock not enough space in GDI heap 01f7 for 24 bytes > err:local:LOCAL_GetBlock not enough space in GDI heap 01f7 for 24 bytes > err:local:LOCAL_GetBlock not enough space in GDI heap 01f7 for 24 bytes > err:local:LOCAL_GetBlock not enough space in GDI heap 01f7 for 24 bytes > err:local:LOCAL_GetBlock not enough space in GDI heap 01f7 for 24 bytes > err:clipping:CLIPPING_UpdateGCRegion hVisRgn is zero. Please report this. > > I dont know what this is. Its not errors coming from the vstserver program. > It seems to be related to X, allthough no graphics is used in the vstserver. > I hope its just the buggy libXrender.so library that wine shouts about each > time it starts. > > 2. Shared memory handlig might be faulty. I suspect that it doesnt free > resources. (see server/shmhandler.c) > > 3. I havent read the vst plug-in documentation yet, and dont know everything > about it. This especially goes for the "AudioMasterCallback" function, which > for now just returns 1. I guess some more work needs to be done in this area, > and for the various dispatch opcodes too. > > 4. The processReplacing function in vstlib should perhaps be made just by calling the > process fuction. But I dont understand the difference between processReplacing > and processing. > > > FUTURE > Add GUI and graphics support to the server (help wanted). And maybe make a > DX-plugin server. (would be fun running pi-warp under linux). > > > CREDITS > vstserver and vstlib are made by Kjetil S. Matheussen / Notam. > k.s.matheussen(a)notam02.no > > Some programming hints is gathered by looking at the pd vst-object plugin~ source > and the jack soundserver source. > > > > > vst ladspa plugin v0.0.1 - alpha > --------------------------------- > > Makes vst plugins located in $VST_PATH > appear as ladspa plugins. > > I'm not sure how well this one actually works. > The northpole plugin seems to work, but others > don't. Oh well, its alpha for now. > > > > > k_vst~, a Pd tilde object for hosting VST plug-ins. > --------------------------------------------------- > > This is really just the plugin~ source made by Jarno Seppänen, > but with a few lines changed (very few that is) to make it > work with vst-plugins using the vstlib. > > The name was changed from plugin~ to k_vst~ to avoid nameclash > with the plugin~ object running ladspa plugins. > > This object is for i386 non-windows (ie. linux/freebsd) only. > > This one works very well! > > > > > ------------------------- > > vstserver, ladspavst and k_vst~ are open-source programs made at Notam / > Oslo, and can be downloaded from from http://www.notam02.no/arkiv/src/ > >

23 years

Re: [linux-audio-dev] Cheap 8 channel Out: multi-IO or USB ? performance etc

by Benno Senoner

>> I heard of USB speakers, could this be a valid solution ? >> Are they supported under linux ? If yes which kind of models ? > they're basically usb audio devices with amp and speaker in one > box - so pretty much all of them work out of box (even the harman > kardon ones that don't work with windows) Thanks for the infos, but has anyone tried to work with more than one signle stereo speakers set at time ? I fear that bandwidth problems could arise when using 8 channels. (AFAIK USB1 is 12Mbit) Anyway these devices seem to be interesting: http://www.adstech.com/products/USBTurboQuad4/intro/USBTurboQ4.asp?pid=USBX… " The USB Turbo Quad 4 offers a powerful performance advantage over all other USB host controllers by providing full USB bandwidth for each port rather than sharing USB bandwidth over all ports. This results in an increase in the number of devices that can simultaneously operate. Only the USB Turbo Quad 4 ensures High-Bandwidth simultaneous operation of USB devices such as cameras, speakers, scanners, modems and other bandwidth intensive peripherals." Just wondering if such a 4 USB port card plus + USB speakers works on 2.4 kernels / ALSA. cheers, Benno -- http://linuxsampler.sourceforge.net Building a professional grade software sampler for Linux. Please help us designing and developing it.

23 years

[linux-audio-dev] Multi-port MIDI interfaces

by iroro

Hi, I'm looking for an "off-the-shelf" Multi-port MIDI interface, (Serial or USB) with some decent linux drivers. Anyone have any suggestions, advice, stories, pointers ?? ... i've googled but nothing interesting turned up. thanks! iroro -- --o0o------------------------------------------------------o0o-- Soon we will be together, writhing profitably on a bed of non-seasonal vegetables in equine bliss. With this vision I see no reason why the operation to remove a 2.2kg uneviscerated turkey carcass from my pericardium should fail [tscg, 2002] --o0o------------------------------------------------------o0o--

23 years

[linux-audio-dev] Cheap 8 channel Out: multi-IO or USB ? performance etc

by Benno Senoner

Hi, a friend of mine is building a system that plays sounds on different speakers (up to 8-10 mono channels ) based on certain input events such as light sensors and mechanical triggers. The audio quality does not need to be high. Latency can be as high as 100 msec. My question is what is the cheapest way to get 8-10 analogue outs. (consumer quality). I heard of USB speakers, could this be a valid solution ? Are they supported under linux ? If yes which kind of models ? Can one use multiple stereo USB speakers on the same USB bus ? e.g. CD quality stereo audio uses 1.4Mbit thus I was wondering how much channels one can reliably stream over USB so that there no dropouts occur ? Recent PCs have two USB outs, is this the same shared bus or can one max out the bandwidth on both ports simultaneously ? How about adding more USB cards, is this supported under Linux ? The other alternative would be to use a multi-io card with 8 or more channels or multiple 4 channel cards ? The Terratec EWS88 8-analogue channels out seems interesting but a bit expensive for my purpose. How about using 2 4-channel cards ? Which card would you suggest ? Hoontech ? Are these (or similar cards) still available ? Sorry for all these questions and thanks for infos ! cheers, Benno -- http://linuxsampler.sourceforge.net Building a professional grade software sampler for Linux. Please help us designing and developing it.

23 years

[linux-audio-dev] Alternitif Bitkisel kanser ilaci Carctol Alternative Cancer Healing

by carctol＠yahoo.com

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23 years

[linux-audio-dev] mpu401 fifo scheduling on linux2.4.18

by Bruce M Beach

Hello All I'm sending some midi data to synthesizer for playback and it appears that the fifo /dev/midi (cmpci mpu401 driver) is not emptying as fast as it should(could), since the play back is highly irregular. Here are some numbers. 1) The timeing slice remains constant at 30 msec +/- 3usec, timed both at the beginning and end of the loop, so the irregularities are not due to loop variations. 2) A maximum of 64 bytes burst, with around 5 bytes normal and an average of 1 byte (say) (ie many slices do nothing) can occur during a slice, the buffer for the driver is 128 bytes with around a maximum capability of around 116 bytes transmitted per slice, so the midi channel can easily sustain the transmission rate at the rate I am sending information. 4) System load while the program is running is around 0.1% 5) The midi performance remains the same even if I do something like build the kernel, and untar some package say glibc at the same time. When I say irregular I mean, for instance on a run of 16th notes the notes will radically speed up and slow down. The notes all have the correct pitches and voice changes etc. are all happening correctly. Just this strange tempo problem. Any thoughts or suggestions would be welcome. Bruce

23 years

Re: [linux-audio-dev] disk latency under 2.4.19 ll+preempt

by Stefan Nitschke

> > > On my asus A7V266-E board i had to set down dma mode from DMA100 to >DMA33 > > get LL working fine. (<3ms) > >That is very interesting information (I have the same board). Did you >discover >this by trial and error? > Yes and No ;) i had one "old" cable to disk2 and when i tried the latency test on the 2nd drive (DMA33) all worked fine. I have the latest BIOS installed. - Stefan _________________________________________________________________ Add photos to your e-mail with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail

23 years

Re: [linux-audio-dev] disk latency under 2.4.19 ll+preempt

by Stefan Nitschke

>From: Maarten de Boer <mdeboer(a)iua.upf.es> >Date: Wed, 20 Nov 2002 08:29:31 +0100 > >On 19 Nov 2002 15:29:19 -0500 >jfm3 <jfm3(a)ouroboros-complex.org> wrote: > > > I'm running the low latency and preemption kernel patches on 2.4.19. I'm > > getting disk copy latency of around 10ms. Since I'm a real time person > > (according to M. Goggins) who doesn't use the hd in real time, I can > > live with this, but it bugs me. I've tried ext2 and ext3, no difference. > > Any other tips? > >Do you have support for your chipset unabled under "IDE, ATA and ATAPI >Block devices" in your kernel configuration, and "Use PCI DMA by default >when available"? I believe this is rather important. > On my asus A7V266-E board i had to set down dma mode from DMA100 to DMA33 get LL working fine. (<3ms) - Stefan _________________________________________________________________ STOP MORE SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail

23 years

[linux-audio-dev] disk latency under 2.4.19 ll+preempt

by jfm3

I'm running the low latency and preemption kernel patches on 2.4.19. I'm getting disk copy latency of around 10ms. Since I'm a real time person (according to M. Goggins) who doesn't use the hd in real time, I can live with this, but it bugs me. I've tried ext2 and ext3, no difference. Any other tips? (Tue Nov 19 15:20:19) (root@head:/home/jfm3/latencytest/latencytest0.42-png) bash> ./do_tests none 3 256 0 350000000 x11perf - X11 performance program, version 1.5 The XFree86 Project, Inc server version 40200000 on :0.0 from head Tue Nov 19 15:20:32 2002 Sync time adjustment is 0.2320 msecs. 2000 reps @ 3.8063 msec ( 263.0/sec): Scroll 500x500 pixels 2000 reps @ 3.8071 msec ( 263.0/sec): Scroll 500x500 pixels 2000 reps @ 3.8092 msec ( 263.0/sec): Scroll 500x500 pixels 2000 reps @ 3.8064 msec ( 263.0/sec): Scroll 500x500 pixels 2000 reps @ 3.8187 msec ( 262.0/sec): Scroll 500x500 pixels 10000 trep @ 3.8095 msec ( 262.0/sec): Scroll 500x500 pixels 120 reps @ 52.5438 msec ( 19.0/sec): ShmPutImage 500x500 square 120 reps @ 52.7976 msec ( 18.9/sec): ShmPutImage 500x500 square 120 reps @ 52.9418 msec ( 18.9/sec): ShmPutImage 500x500 square 120 reps @ 52.8095 msec ( 18.9/sec): ShmPutImage 500x500 square 120 reps @ 52.8810 msec ( 18.9/sec): ShmPutImage 500x500 square 600 trep @ 52.7948 msec ( 18.9/sec): ShmPutImage 500x500 square fragment latency = 1.451247 ms cpu latency = 1.160998 ms 2.1ms ( 0)| 1MS num_time_samples=57348 num_times_within_1ms=57348 factor=100.000000 2MS num_time_samples=57348 num_times_within_2ms=57348 factor=100.000000 PIXEL_PER_MS=155 fragment latency = 1.451247 ms cpu latency = 1.160998 ms 2.0ms ( 0)| 1MS num_time_samples=20877 num_times_within_1ms=20877 factor=100.000000 2MS num_time_samples=20877 num_times_within_2ms=20877 factor=100.000000 PIXEL_PER_MS=155 fragment latency = 1.451247 ms cpu latency = 1.160998 ms 4.6ms ( 2)| 1MS num_time_samples=28116 num_times_within_1ms=28113 factor=99.989330 2MS num_time_samples=28116 num_times_within_2ms=28115 factor=99.996443 PIXEL_PER_MS=155 -rw-r--r-- 1 root root 350000000 Nov 19 15:23 tmpfile fragment latency = 1.451247 ms cpu latency = 1.160998 ms 6.9ms ( 44)| 1MS num_time_samples=68188 num_times_within_1ms=68144 factor=99.935473 2MS num_time_samples=68188 num_times_within_2ms=68144 factor=99.935473 PIXEL_PER_MS=155 -rw-r--r-- 1 root root 350000000 Nov 19 15:23 tmpfile -rw-r--r-- 1 root root 350000000 Nov 19 15:25 tmpfile2 fragment latency = 1.451247 ms cpu latency = 1.160998 ms 6.5ms ( 8)| 1MS num_time_samples=54930 num_times_within_1ms=54921 factor=99.983616 2MS num_time_samples=54930 num_times_within_2ms=54923 factor=99.987257 PIXEL_PER_MS=155 -rw-r--r-- 1 root root 350000000 Nov 19 15:23 tmpfile -rw-r--r-- 1 root root 350000000 Nov 19 15:25 tmpfile2 -- (jfm3 2838 BCBA 93BA 3058 ED95 A42C 37DB 66D1 B43C 9FD0)

23 years

[linux-audio-dev] [OT] Linux Music & Sound Software site updated

by Dave Phillips

Greetings: As of November 19 2002 the Linux Music & Sound Applications pages have been updated. This site contains more links to Linux audio, MIDI, and DSP sites than you can shake a stick at (== a lot), making it the most comprehensive listing of its kind on the Internet. The site may be reached here: http://sound.condorow.net (USA) Here: http://linuxsound.at (Europe) Here: http://linuxsound.ymo.org (Japan) (As aways, the Japanese site will not update until midnight tonight.) Best regards, == Dave Phillips The Book Of Linux Music & Sound at http://www.nostarch.com/lms.htm The Linux Soundapps Site at http://linux-sound.org Currently listening to: New London Consort, "Veritas veritatum" (Carmina Burana)

23 years

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