Linux-audio-user August 2005

linux-audio-user@lists.linuxaudio.org

169 participants
209 discussions

[linux-audio-user] Mix Minus with AM-Pitchshift; a study in Linux Audio usability

by R Parker

Hi, I've begun working alot more with LADSPA plugins and have found it very easy to achieve satisfying results. www.iaxs.net/~rparker/legaladvice.ogg Despite the relative ease with which my partners Bill, Dana and I were able to achieve our final product, legaladvice.ogg, the real acid test is whether or not anyone thinks the final product is effective. Give it a listen and let me know what you think. A JK Audio RemoteMix3, phone dialer with audio i/o, is used to build a mix minus. I imagine you can google for that. We run a Neumann M 147 tube mic into an Avalon Vt 737sp which inserts into a channel on the Tascam DM-24. We send that channel direct (it's not assigned to the DM-24 stereo buss) to Ardour where Barry's Satan Maximizer and the Steve Harris AM-Pitchshift are inserted pre-fader. The effected return from Ardour routes back to the RemoteMix3 via an Aux bus (DAC/analog send) from a new DM-24 channel that is not assigned to stereo buss. That pitchshifted/maximized Aux send replaces my telephone and is mixed into a conversation with another caller in the RemoteMix3. The RemoteMix3 analog output routes to the DM-24 in a channel that is assigned to the stereo bus where we finally get to monitor it. A wireless lav would have enabled us to wonder around the studio while monitoring phone conversations on the Alesis M1 Active monitors. Definitely a bonus for the multitasking professional that doesn't want to be restricted to a single task because of some stupid wire. ron __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 1 month

[linux-audio-user] Re: "Music" made with Linux!

by davidrclark＠earthlink.net

Juhana recently posted: (A) Someone who makes great songs with commercial synths should replace the synth track with a track made with an open source synths. For the demo purposes only. (B) Someone could create a MIDI file which plays great with commercial synths. The output should be recorded for us. Then we try to create the same with open source synths, possibly improving the software at the same time. -------------- While at first I thought: "I don't want to do this, but I'd like to hear the results." But when Flo responded so negatively, I began to examine my own reaction. This is a good idea. All of the synth manufacturers that I'm aware of create numerous tunes to show off the synth. It would be nice to have something that allows one to compare sounds between synths as well. These demo tunes usually show off advanced features of the synth, whereas sometimes all I want is to hear a simple phrase. The Roland XV-3080 has a function wherein by merely pressing in the volume knob, a phrase is generated so the user can hear the tone (patch, instrument, performance, combination, etc.). I use this function all the time to simply hear the difference between patches and performances. It doesn't always work well, but it does help. Now doing this will not be easy. The phrases chosen need to be chosen based on the type of intrument and so on. For some instruments, it just isn't possible to audition like this using MIDI files. But many synths can do this. I'll probably start with variations of the Roland phrases. I'll see what I can do to create a set of phrases for comparisions, then ask that others add to it. If some sets of recordings could be posted for popular synths, then users (esp. newbies) could decide whether or not it would be beneficial to try and install it or go elsewhere. Now I fully realize that one needs to hear tones in context and all that, but surely people would admit to using audition functions for comparisons. And it's possible to create audition phrases WITH context, too. Thanks for that suggestion Juhana. I have my own instrument-creation programs and will probably find audition phrases more useful than my mere hacking on the keyboard. Regards to all, Dave.

20 years, 1 month

[linux-audio-user] [OT] wireless

by Lee Revell

OK, I've never done wireless with Linux before, and (surprise) it's apparently a baffling ordeal, as lots of common devices aren't supported! All I need to know is "does the Linksys WUSB 54G work OOTB". IOW configure the kernel source, make, make install and no f*ing with out of tree drivers. TIA, Lee

20 years, 1 month

[linux-audio-user] ladspa benchmark

by Atte André Jensen

Hi As a new om user I'm concerned about the speed/effeciency of the various ladspa plugins. Is there a tool that will do benchmark tests on ladspa plugins? -- peace, love & harmony Atte http://www.atte.dk

20 years, 1 month

[linux-audio-user] preempt patch and USB audio

by Hector Centeno

Hi, I've being experiencing system freezes and IRQs dying with the kernels that include Ingo's preempt patch using FC3+CCRMA and Demudi. I'm using a USB audio interface (M-Audio Duo). I would like to post some information hoping somebody could point me to a fix. This are my USB controllers: 02:0b.0 USB Controller: NEC Corporation USB (rev 43) (prog-if 10 [OHCI]) Subsystem: Unknown device 3083:0035 Flags: bus master, medium devsel, latency 64, IRQ 23 Memory at feafd000 (32-bit, non-prefetchable) [size=4K] Capabilities: [40] Power Management version 2 02:0b.1 USB Controller: NEC Corporation USB (rev 43) (prog-if 10 [OHCI]) Subsystem: Unknown device 3083:0035 Flags: bus master, medium devsel, latency 64, IRQ 20 Memory at feafe000 (32-bit, non-prefetchable) [size=4K] Capabilities: [40] Power Management version 2 02:0b.2 USB Controller: NEC Corporation USB 2.0 (rev 04) (prog-if 20 [EHCI]) Subsystem: Unknown device 3083:00e0 Flags: bus master, medium devsel, latency 64, IRQ 21 Memory at feaff400 (32-bit, non-prefetchable) [size=256] Capabilities: [40] Power Management version 2 and this is dmesg after the tragedy (here in Demudi as in FC3 the system hard locks and I can't get a dmesg): usbcore: registered new driver snd-usb-audio ohci_hcd 0000:02:0b.0: bad entry 34e630c0 ohci_hcd 0000:02:0b.0: OHCI Unrecoverable Error, disabled ohci_hcd 0000:02:0b.0: HC died; cleaning up usb 5-1: USB disconnect, address 2 irq 193: nobody cared! [<c013c52a>] __report_bad_irq+0x2a/0xa0 (8) [<c013c630>] note_interrupt+0x70/0xb0 (20) [<c013c3c4>] do_hardirq+0xe4/0xf0 (28) [<c013c3d0>] do_irqd+0x0/0xb0 (32) [<c013c449>] do_irqd+0x79/0xb0 (4) [<c013055a>] kthread+0xaa/0xb0 (28) [<c01304b0>] kthread+0x0/0xb0 (28) [<c010133d>] kernel_thread_helper+0x5/0x18 (16) handlers: [<f8a4cfc0>] (usb_hcd_irq+0x0/0x70 [usbcore]) [<f8a4cfc0>] (usb_hcd_irq+0x0/0x70 [usbcore]) Disabling IRQ #193 ohci_hcd 0000:02:0b.0: leak ed f490e080 (#03) state 0 (has tds) ohci_hcd 0000:02:0b.0: leak ed f490e040 (#85) state 0 (has tds) BUG: Unable to handle kernel NULL pointer dereference at virtual address 00000000 printing eip: c01a35f6 *pde = 00000000 Oops: 0000 [#2] PREEMPT Modules linked in: snd_usb_audio snd_usb_lib radeon drm thermal fan button processor ac battery realtime commoncap ipv6 af_packet ohci_hcd sk98lin ohci1394 snd_intel8x0 snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc i2c_i801 i2c_core ehci_hcd usbhid uhci_hcd usbcore shpchp pci_hotplug intel_agp agpgart parport_pc parport floppy pcspkr tsdev mousedev evdev sr_mod sbp2 scsi_mod ieee1394 psmouse ide_cd cdrom snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore genrtc ext3 jbd mbcache ide_disk ide_generic via82cxxx trm290 triflex slc90e66 sis5513 siimage serverworks sc1200 rz1000 piix pdc202xx_old opti621 ns87415 hpt366 hpt34x generic cy82c693 cs5530 cs5520 cmd64x atiixp amd74xx alim15x3 aec62xx pdc202xx_new ide_core unix CPU: 0 EIP: 0060:[<c01a35f6>] Not tainted VLI EFLAGS: 00010246 (2.6.12-3-multimedia-686) EIP is at get_kobj_path_length+0x26/0x40 eax: 00000000 ebx: 00000000 ecx: ffffffff edx: f48b5098 esi: 00000001 edi: 00000000 ebp: ffffffff esp: c18e5d6c ds: 007b es: 007b ss: 0068 preempt: 00000001 Process events/0 (pid: 4, threadinfo=c18e4000 task=dfc045a0) Stack: f48b5058 f48b5074 f48c2798 f48b5098 c01a368f f48b5098 c014612b dffef080 dffef0c4 f48b5058 f48b5074 f48c2798 000003a8 c0203dd4 f48b5098 000000d0 c0145f8e dffefac4 f497bd40 00000016 ffffffff fffffffd f48b502c 00000000 Call Trace: [<c01a368f>] kobject_get_path+0x1f/0x80 (20) [<c014612b>] __kmalloc+0x7b/0x140 (8) [<c0203dd4>] class_hotplug+0x134/0x200 (28) [<c0145f8e>] kmem_cache_alloc+0x4e/0x120 (12) [<c01a438e>] kobject_hotplug+0x1ee/0x300 (60) [<c0134f79>] rt_up+0x59/0x60 (60) [<c020427f>] class_device_del+0x8f/0xe0 (20) [<c02042e3>] class_device_unregister+0x13/0x30 (32) [<f88eb5ee>] snd_unregister_device+0x9e/0xf0 [snd] (12) [<f8ac683a>] snd_pcm_dev_unregister+0x5a/0xe0 [snd_pcm] (32) [<f88f0477>] snd_device_free+0xa7/0xc0 [snd] (32) [<f88f06c0>] snd_device_free_all+0x60/0x70 [snd] (16) [<f88ebe4c>] snd_card_free+0x12c/0x260 [snd] (28) [<c0130ab0>] autoremove_wake_function+0x0/0x60 (20) [<c0130ab0>] autoremove_wake_function+0x0/0x60 (32) [<f88ebfcf>] snd_card_free_thread+0x4f/0xc0 [snd] (36) [<c012bdbd>] worker_thread+0x1cd/0x270 (24) [<f88ebf80>] snd_card_free_thread+0x0/0xc0 [snd] (20) [<c0117390>] default_wake_function+0x0/0x30 (32) [<c0117390>] default_wake_function+0x0/0x30 (32) [<c012bbf0>] worker_thread+0x0/0x270 (36) [<c013055a>] kthread+0xaa/0xb0 (4) [<c01304b0>] kthread+0x0/0xb0 (28) [<c010133d>] kernel_thread_helper+0x5/0x18 (16) Code: 90 8d 74 26 00 55 bd ff ff ff ff 57 56 be 01 00 00 00 53 8b 54 24 14 31 db 8d b6 00 00 00 00 8d bf 00 00 00 00 8b 3a 89 e9 89 d8 <f2> ae f7 d1 49 8b 52 24 8d 74 31 01 85 d2 75 ea 5b 89 f0 5e 5f I've tried changing the IRQ latency as well as the priority using chrt pidof and setpci but nothing improves. I tried also starting the kernel with no acpi using pci=noacpi and acpi=off (one at a time). The problem usually is triggered by starting and/or closing an audio application while running jack. Probably the easiest solution would be to stop trying to use a USB audio interface... but anyway, I would like to try a little more. thank you in advance! Hector

20 years, 1 month

Re: [linux-audio-user] VST Plugins Revisited (Again)

by davidrclark＠earthlink.net

Lee Revell posted: Wrong, obviously, the future of Linux music production is using native Linux audio applications under Linux. ---------------------- Assuming that Linux music production actually has a future, one would hope that this would be the case. Meanwhile: As a demonstration of what can be done right now, here's something I did today entirely with entry-level *Windows software running under WINE*, no plugins involved (so I guess it's slightly off-topic), and *not* including CompMuzys: http://home.earthlink.net/~davidrclark/linux_audio_users/slow_rock.ogg Composition/edit -> MIDI edit and arrange -> Mix -> one-button record -> WAV file. (Then Linux oggenc for publishing.) External synth. About 90 minutes total. I believe that this is a realistic scenario for a music production person in a hurry at a TV station, for example --- beyond the work process involved with merely recording a guitar for a minute or two, but not CD production. Who knows what else those WINE guys might make happen? Note: I did *not* use my Green's-function 3-D audio programs on this, so the reverb doesn't sound like my normal stuff with headphones, in case anyone notices. Regards to all, Dave.

20 years, 1 month

[linux-audio-user] mixer app

by Atte André Jensen

Hi I'm looking for a mixer app that: * works with alsa/jack * has multiple inputs, and (at least) stereo out * will let me load a "mix", change it from a hardware controller, and save the modified "mix" It would be nice with some sort of gui and a way to name the tracks. What I'd like to do is route the output of variuos softsynths to one app. This is done from a script, with one script per song. So if I find that one sound is a bit too low or something, I reach for a knob adjust the volume and save the "mix" so it's there next time I run the script... -- peace, love & harmony Atte http://www.atte.dk

20 years, 1 month

Re: [linux-audio-user] VST Plugins Revisited (Again)

by davidrclark＠earthlink.net

Paul Davis, You recently posted: i find it amusing that people think hard, difficult work like running shared libraries from *another operating system* should somehow just happen. I myself was floored when it all worked. That's why I posted this information (again). Personally I look at this as an existence proof of something I didn't think was possible --- certainly not through mere installation. I can't even get my own stuff to work this well. Regards, Dave.

20 years, 1 month

[linux-audio-user] Best linux accomp software for jazz?

by Iain Duncan

Just wondering what the preferred "linux band in a box" is for learning jazz tunes. My criteria would be ability to handle complex chord symbols precisely and preferable light weight so I can run it on an old p3 600 lappy. Thanks Iain

20 years, 1 month

[linux-audio-user] Ubuntu bounty

by Lee Revell

Hey, I noticed that Ubuntu has an unclaimed bounty to reengineer a bunch of the sound events for the Breezy release. I figured if there's anyone who'd want to (get paid to) do this, they'd be on this list. It's a fairly detailed spec, I bet someone could do it in a day. http://udu.wiki.ubuntu.com/SoundEvents Lee

20 years, 1 month

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Linux-audio-user August 2005