Linux-audio-user February 2017

linux-audio-user@lists.linuxaudio.org

38 participants
50 discussions

by Maurizio Berti

Hello, In the last weeks I've been working on an editor and librarian for the Waldorf Blofeld synthesizer, since I wasn't satisfied enough with the alternatives. It's still a work in progress (the librarian doesn't allow actual reordering yet, arpeggiator editor and mod matrix are still missing), but it already allows sound dumping from the Blofeld and parameter editing for almost everything. It also features a virtual keyboard to test sounds directly from the interface. Here you can see a screenshot for the editor (that can be opened with a right click on a sound in the librarian window): https://cloud.githubusercontent.com/assets/523596/23169061/a8af598c-f84a-11… I created a set of custom widgets (since the standard ones depend too much on the system themeing, and they miss some important things I needed) and this should grant consistency for the interface. If you are interested in testing it, you can find it here: https://github.com/MaurizioB/Bigglesworth It requires PyQt4 and pyalsa, and it's written in Python 2.7. Any comment is appreciated.. Cheers!

8 years, 10 months

Re: [LAU] Waldorf Blofeld editor

by Maurizio Berti

Il 21/feb/2017 18:28, "Ralf Mardorf" <ralf.mardorf(a)alice-dsl.net> ha scritto: PS: If I zoom out, so that the GUI fits into the screen, then anything is still good readable! Wait, do you mean that you are able to zoom out the window? :-O How?

8 years, 10 months

[LAU] 16 frames, no xruns -> Mobo + CPU + RAM + PSU < 180,- €

by Ralf Mardorf

Hi, if you should need a cheap computer for audio, the setup I'm using might be interesting for you, too. RME HDSPe AIO 48 KHz, 32 frames, no xruns Focusrite Scarlett 18i20 2nd Gen 48 KHz, 16 frames, no xruns Another advantage, the PC is absolutely silent, but there are also two disadvantages. There are issues with the Intel graphics and the PSU cables already smelled bad, when it wasn't used. For compiling in tmpfs I'll get 4 additional GiB of RAM soon or later, since 4 GiB aren't enough to compile a kernel. However, compiling a kernel using a SSD instead of tmpfs takes 60 minutes. Even with the shared IRQs there are no xruns, at least not for a test song I already used with my old mobo and the Focusrite. On the 9 years old mobo the RME AIO at 256 frames run with inaudible xruns and the Focusrite at 128 frames without xruns, so the test song already says a little bit about the audio performance of the new mobo. I didn't check MIDI jitter and a test is just a test, but seemingly this cheap computer is usable for audio. Some IRQs differ after a reboot, but the RME card, the TerraTec card and ehci always share IRQ 16. [root@archlinux rocketmouse]# hwinfo --bios | grep Manufacturer -A1 | head -2; hwinfo --cpu | grep Model | sort -u; hwinfo --memory | grep Size Manufacturer: "Gigabyte Technology Co., Ltd." Product: "B85M-D3H" Model: 6.60.3 "Intel(R) Celeron(R) CPU G1840 @ 2.80GHz" Memory Size: 3 GB + 768 MB [root@archlinux rocketmouse]# cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governorperformance performance [root@archlinux rocketmouse]# aplay -l | grep -v HDA\ Intel | grep -v Sub **** List of PLAYBACK Hardware Devices **** card 0: HDSPMx579bcc [RME AIO_579bcc], device 0: RME AIO [RME AIO] card 1: EWX2496 [TerraTec EWX24/96], device 0: ICE1712 multi [ICE1712 multi] card 5: USB [Scarlett 18i20 USB], device 0: USB Audio [USB Audio] [root@archlinux rocketmouse]# uname -rm 4.9.11-rt9-1-rt-celeron x86_64 [root@archlinux rocketmouse]# rtirq status PID CLS RTPRIO NI PRI %CPU STAT COMMAND 102 FF 90 - 130 0.3 S irq/16-ehci_hcd 105 FF 90 - 130 0.1 S irq/25-xhci_hcd 121 FF 89 - 129 0.0 S irq/23-ehci_hcd 257 FF 85 - 125 0.4 S irq/16-snd_hdsp 373 FF 80 - 120 0.0 S irq/16-snd_ice1 38 FF 50 - 90 0.0 S irq/9-acpi 52 FF 50 - 90 0.0 S irq/8-rtc0 103 FF 50 - 90 0.0 S irq/1-i8042 106 FF 50 - 90 0.0 S irq/26-ahci[000 256 FF 50 - 90 0.0 S irq/27-mei_me 258 FF 50 - 90 0.0 S irq/5-parport0 260 FF 50 - 90 0.0 S irq/28-snd_hda_ 262 FF 50 - 90 0.0 S irq/29-i915 374 FF 50 - 90 0.0 S irq/18-i801_smb 375 FF 50 - 90 0.0 S irq/31-snd_hda_ 485 FF 50 - 90 0.0 S irq/30-enp3s0 3 TS - 0 19 0.0 S ksoftirqd/0 21 TS - 0 19 0.0 S ksoftirqd/1 The BIOS is used with it's defaults and I didn't update the BIOS. Since everything seems to be ok for audio, I'll only disable the onboard sound and the full screen logo, but won't upgrade the BIOS or change any serious settings. Regards, Ralf

8 years, 10 months

[LAU] I had a scary reminder.

by Will Godfrey

It's very easy to get so engrossed in coding that you lose track of what it's all about. Well after some heavy sessions - especially last December - I thought I needed a break, so sat down to play some of my old compositions. Only I couldn't! I was stumbling badly over stuff I used to rattle off one after another without a thought. Somewhat in panic, towards the end of January I started practicing at least one of these every day. At first it was singularly depressing, but today I actually managed three of them in sucession with hardly any faults. Rather pleased with myself, I then went on to just play whatever came to mind, and soon found myself in the 'zone' - something else that's been quite absent resently. So this is what I came up with. I hope you like it. http://www.musically.me.uk/music/Genesis.ogg I shall continue practicing :) -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

8 years, 10 months

Re: [LAU] Waldorf Blofeld editor

by Maurizio Berti

Il 21/feb/2017 17:44, "Ralf Mardorf" <ralf.mardorf(a)alice-dsl.net> ha scritto: Hi, on a not very bright CRT at 1152x864 the GUI looks like it is a very good usable GUI. That's an unusual screen resolution, I suppose that the editor doesn't fit it, if I correctly recall the base size. I'm still thinking about shrinking some controls or, eventually, add a general magnification system (which might also be useful for high pixel density systems). Thank you!

8 years, 10 months

[LAU] Searching the list archives?

by Mac

I'm trying to figure out how to get control of JACK (maybe dbus...not sure) after it seems to have lost it way. (I've found that with my ffado setup, that sometimes power cycle on the device will clear the error and allow jack to start again, but with a usb device an unplug/plug doesn't seem to be effective.) I've posted about this before and it was noted that there has been plenty discussion of this on the list...so I went off to search the archives. But, LAU website has a link for more info...it gets a 404 error. ( http://linuxaudio.org/mailarchive/ ) And, the archive page ( http://lists.linuxaudio.org/pipermail/linux-audio-user/ ) has zips of the archive for each month. I'm guessing I'm missing something obvious (at least that would be typical for me... ;) ). Also, I've posted on the jack IRC channel a couple times...there seems to be nothing but crickets there 24/7, but it lists, typically, 60 or more people in the room. Is there a secret handshake? I'm pretty sure I've conversed with autostatic and edogawa in IRC's before and they are listed as in the room... Regards, Mac

8 years, 10 months

[LAU] "JX-O5" (Roland JX-03 track made on Linux)

by Christopher Arndt

Hi all, this track admittedly doesn't make use of much open source software (except zita-reverb), but it was recorded on a Linux system nevertheless, using Tracktion 7 and an el-cheapo Behringer UCA-222 audio interface. https://soundcloud.com/spotlightkid/jx-o5 (Download: https://chrisarndt.de/music/homerecording/JX-O5.ogg) All sounds are from a Roland JX-03 Boutique synth, except drums, which are Roland CR78 samples sequenced in the DAW. This a a quick two evenings weekend jam and the mix is a bit muddy, sorry, it all was thrown together rather quickly. I'm happy to report that the Roland JX-03 works very well together with Linux. USB-MIDI works out of the box (though USB audio doesn't) and patch up-/download via USB mass storage mode also poses no problems. The MIDI implementation of the JX-03 has a few minor issues (e.g. no smoothing of parameter changes via CC, very occassionally hanging notes, step sequencer always starts on MIDI start), but overall, with the new firmare that supports parameter editing via CCs, the synth can be easily integrated into any Linux DAW setup. Share & Enjoy, Chris

8 years, 10 months

[LAU] Music: test-jam105

by jonetsu

Hello, This is a somewhat relaxed piece that contrasts a laided back rhythm with a busy bass over which an acoustic guitar weaves some chords. A piano (slightly doubled by a synth) adds a melody while an analog sounding synth provides a solo. This is a test insofar the rhythm is solely made using a single Biotek synth factory patch (Algorithmic Spring). Knobs were assigned to various parameters of the 'wild' Biotek interface and were recorded as automation after an initial recording. These parameters influences several sound aspects of the rhythm. Only this patch is playing in the first 8 bars. https://soundcloud.com/nominal6/test-jam105 Cheers.

8 years, 10 months

[LAU] Nexus 7 Tablet worth it for audio?

by F Tux

Greetings to all of you out there. My brother donated me his nexus 7 (2012) tablet because he got an ipad. I either want to use it as a tactile effects processor, or as a midi controller sending sysex to a hardware synth. I did some online research to come to the conclusion no android apps are useful enough for me. I know it's possible to get linux into the device, and I was wondering if any of you have any experience on that. I don't want to get too deep into troubleshooting this time and I was wondering if it's gonna be worth the effort. How is the hardware support? Can I plug it to my fast track pro card? Is the touchscreen any good under linux? Is latency too high to be usable live? Another reason I'm asking here is because someone offered me to exchange the tablet for an Ensoniq EPS (the 13-bit one). I don't want a Facebook browsing gadget, and I already have a netbook for mobile computing, so if you have any recommendations, don't refrain yourselves. Otherwise I'm trading it. Thanks for your attention. Have yourselves a good week. Fede

8 years, 10 months

[LAU] Unbinding USB devices

by Ralf Mardorf

Hi, I've got a new mobo, it's a GIGABYTE GA-B85M-D3H. It has got 8 "USB 2.0/1.1 ports"[1] and 2 "USB 3.0/2.0 ports"[1]. [1] Quoting the user's manual Actually it provides 4 USB 3.0/2.0 ports, but only 2 are available at the moment, since I don't have brackets/front panels for USB 3.0. There are two ehci devices, one shares the IRQ with audio cards. If I unbind the ehci device that shares the IRQ with audio cards, still all 10 available USB ports work, but I get rid of sharing the IRQ with USB. Could somebody explain what this does mean? If I unbound ports on my old mobo, they stopped working. [rocketmouse@archlinux ~]$ rtirq status PID CLS RTPRIO NI PRI %CPU STAT COMMAND 102 FF 90 - 130 0.0 S irq/16-ehci_hcd 225 FF 90 - 130 0.0 S irq/27-xhci_hcd 119 FF 89 - 129 0.0 S irq/23-ehci_hcd 312 FF 85 - 125 0.0 S irq/16-snd_hdsp 313 FF 80 - 120 0.0 S irq/16-snd_ice1 38 FF 50 - 90 0.0 S irq/9-acpi 52 FF 50 - 90 0.0 S irq/8-rtc0 101 FF 50 - 90 0.0 S irq/1-i8042 104 FF 50 - 90 0.4 S irq/25-ahci[000 224 FF 50 - 90 0.0 S irq/26-mei_me 227 FF 50 - 90 0.0 S irq/5-parport0 229 FF 50 - 90 0.0 S irq/28-snd_hda_ 235 FF 50 - 90 0.0 S irq/30-i915 314 FF 50 - 90 0.0 S irq/18-i801_smb 315 FF 50 - 90 0.0 S irq/31-snd_hda_ 442 FF 50 - 90 0.0 S irq/29-enp3s0 3 TS - 0 19 0.0 S ksoftirqd/0 21 TS - 0 19 0.0 S ksoftirqd/1 [rocketmouse@archlinux ~]$ cd /sys/bus/pci/drivers/ehci-pci/ [rocketmouse@archlinux ehci-pci]$ ls -l | grep devices lrwxrwxrwx 1 root root 0 Feb 19 17:00 0000:00:1a.0 -> ../../../../devices/pci0000:00/0000:00:1a.0 lrwxrwxrwx 1 root root 0 Feb 19 17:00 0000:00:1d.0 -> ../../../../devices/pci0000:00/0000:00:1d.0 [rocketmouse@archlinux ehci-pci]$ printf "0000:00:1a.0" | sudo tee unbind >/dev/null [sudo] password for rocketmouse: [rocketmouse@archlinux ehci-pci]$ ls -l | grep devices lrwxrwxrwx 1 root root 0 Feb 19 17:00 0000:00:1d.0 -> ../../../../devices/pci0000:00/0000:00:1d.0 [rocketmouse@archlinux ehci-pci]$ rtirq status PID CLS RTPRIO NI PRI %CPU STAT COMMAND 225 FF 90 - 130 0.0 S irq/27-xhci_hcd 119 FF 89 - 129 0.0 S irq/23-ehci_hcd 312 FF 85 - 125 0.0 S irq/16-snd_hdsp 313 FF 80 - 120 0.0 S irq/16-snd_ice1 38 FF 50 - 90 0.0 S irq/9-acpi 52 FF 50 - 90 0.0 S irq/8-rtc0 101 FF 50 - 90 0.0 S irq/1-i8042 104 FF 50 - 90 0.1 S irq/25-ahci[000 224 FF 50 - 90 0.0 S irq/26-mei_me 227 FF 50 - 90 0.0 S irq/5-parport0 229 FF 50 - 90 0.0 S irq/28-snd_hda_ 235 FF 50 - 90 0.0 S irq/30-i915 314 FF 50 - 90 0.0 S irq/18-i801_smb 315 FF 50 - 90 0.0 S irq/31-snd_hda_ 442 FF 50 - 90 0.0 S irq/29-enp3s0 3 TS - 0 19 0.0 S ksoftirqd/0 21 TS - 0 19 0.0 S ksoftirqd/1 Regards, Ralf

8 years, 10 months

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Linux-audio-user February 2017