Search found 1498 matches

by raboof
Sat Dec 15, 2018 9:24 am
Forum: Suggestion Box
Topic: Temporal Anomalies
Replies: 4
Views: 79

Re: Temporal Anomalies

Also at the moment the unlocking (unfortunately necessary for spam protection) after a successful 3/5 post, so that he can post freely, is not working properly, so we (rather raboof) have to unlock it manually. Does anyone know anything about this (forum software / php?)? Tips and help are also wel...
by raboof
Fri Dec 14, 2018 8:49 am
Forum: Computer Related Hardware
Topic: What does the audio interface do?
Replies: 2
Views: 49

Re: What does the audio interdace do?

On windows "they" said you need an audio interface for the low latency drivers etc, but on linux do you really need an audio interface? What actually does it do? I'm not sure what exactly you are referring to. Generally, "audio interface" is just a fancy word for "sound car...
by raboof
Wed Dec 12, 2018 2:34 pm
Forum: Recorders & Sequencers
Topic: Beginner question about KXStudio
Replies: 41
Views: 890

Re: Beginner question about KXStudio

my advice was friendly Your first post in this topic was: So, now it's okay to post idiotic shit on forums, like: “I'm a total dumbster and can't even wipe my ass without assistance, HELP PLEASE!!!!11”. Do I get you right? The original question was as unreasonable as it is possible. That's not OK h...
by raboof
Wed Dec 12, 2018 8:58 am
Forum: Recorders & Sequencers
Topic: Beginner question about KXStudio
Replies: 41
Views: 890

Re: Beginner question about KXStudio

This thread didn't detonate the self-destruction of the world's search engines or the open source community This particular thread didn't, but when it happens on every forum out there, it becomes hard to find something valuable. As I said above, I've got a little experience in IT (*nix system admin...
by raboof
Tue Dec 11, 2018 4:36 pm
Forum: Recorders & Sequencers
Topic: Beginner question about KXStudio
Replies: 41
Views: 890

Re: Beginner question about KXStudio

Thanks for all the good replies here! And yes, let's keep it friendly :D
by raboof
Thu Dec 06, 2018 10:42 am
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

When using Jack MIDI, you would process these events in the Jack callback. Here you have the choice to either take into account the time of the event (introducing extra latency) or apply each event to the beginning of the current audio buffer (introducing extra jitter). Or am I missing something he...
by raboof
Thu Dec 06, 2018 9:56 am
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

People vastly underestimate the brain's ability to latency/jitter compensate on the fly. That applies to both the performer and the listener. Unless the errors are really extreme it will sound OK. I agree with you wholeheartedly with respect to latency. With respect to jitter, I agree it depends on...
by raboof
Thu Dec 06, 2018 9:46 am
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

Actually the timestamp/frame of the incoming MIDI message is recorded (http://jackaudio.org/api/struct__jack__midi__event.html, https://github.com/jackaudio/jack2/blob ... r.cpp#L187), but indeed it is up to you as the library user to decide whether you want to ignore it (more jitter) or take it in...
by raboof
Wed Dec 05, 2018 4:32 pm
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

jack-midi does exactly what jeff proposed, no timestamp, plain messages handled as they comes in. Actually the timestamp/frame of the incoming MIDI message is recorded (http://jackaudio.org/api/struct__jack__midi__event.html, https://github.com/jackaudio/jack2/blob/master/linux/alsarawmidi/JackALSA...
by raboof
Wed Dec 05, 2018 12:20 pm
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

Not sure whether it is relevant, but I reviewed a 2007 article about latency perception here on my blog . I don't know if perception is at all similar for jitter, but as far as latency goes latency can be detected by humans starting from 2 - 3 ms. The study finds lower thresholds, but data might be...
by raboof
Wed Dec 05, 2018 10:49 am
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

Roland did studies that revealed that, even among musicians, humans can't detect timing discrepancies of less than 3 milliseconds. (...) it was internal research Roland R+D did while developing products like the tr-808 and later mpu-401, in order to determine the minimum useable clock rate for the ...
by raboof
Tue Dec 04, 2018 9:16 pm
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

Isn't taking into account timestamps needed to prevent jitter? Yes, but that's an irrelevant point. Jitter is a problem only if/when a human detects it. That is obviously true. Roland did studies that revealed that, even among musicians, humans can't detect timing discrepancies of less than 3 milli...
by raboof
Tue Dec 04, 2018 5:15 pm
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

I've realised that this based on nothing, but I thought that by using JACK MIDI I would have something like realtime MIDI, because JACK is working in realtime. Using JACK MIDI will make sure that, once observed, the MIDI events will flow through your system at predictable latency, just like for aud...
by raboof
Tue Dec 04, 2018 5:13 pm
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

In all cases where I play with MIDI I get more xruns than when I play my hardware e-bass through Linux effects and then possibly record. Only audio I get as good as no xruns. MIDI-to-Audio I get xruns. I suspect they are complex dependencies on the individual priorities assigned to the A) RT kernel...
by raboof
Tue Dec 04, 2018 4:51 pm
Forum: System Tuning and Configuration
Topic: RT MIDI
Replies: 47
Views: 859

Re: RT MIDI

Many devs treat midi as an afterthought, and sometimes do things that completely subvert its realtime properties (especially when they try to put a "timestamp" on each incoming message). Since MIDI is what internally drives BackupBand, its midi input pulls out every trick in the book to a...

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