Search found 33 matches

by tbritton
Thu Feb 28, 2013 8:34 pm
Forum: KXStudio Discussion
Topic: List of JACK Frame & Period settings ideal for USB interface
Replies: 14
Views: 7066

Re: List of JACK Frame & Period settings ideal for USB inter

Looks good! Thanks! Just one thing, I think you can't license an article in the Wiki the way you'd want to. The whole Wiki is CC by-nc-sa licensed at the moment and I'm not sure what the implications are if you impose a different license on an article. Oh, I didn't know - I'll change it. I was just...
by tbritton
Wed Feb 27, 2013 2:18 am
Forum: KXStudio Discussion
Topic: Good working live 4 out usb soundcard for KXStudio?
Replies: 4
Views: 2290

Re: Good working live 4 out usb soundcard for KXStudio?

Here is a thread on the Focusrite offering.

viewtopic.php?f=6&t=10142

I own the 2i2 with 2 in 2 out and "out of the box" would describe its workings well.

Terry
by tbritton
Sat Feb 23, 2013 1:19 am
Forum: KXStudio Discussion
Topic: List of JACK Frame & Period settings ideal for USB interface
Replies: 14
Views: 7066

Re: List of JACK Frame & Period settings ideal for USB inter

AutoStatic, I put it into a Wiki entry as you suggested. (didn't figure out how to do tables yet, but I will delve more deeply into the documentation for the wiki syntax later.) http://wiki.linuxmusicians.com/doku.php?id=list_of_jack_frame_period_settings_ideal_for_usb_interface Thanks for the feedb...
by tbritton
Fri Feb 22, 2013 5:20 am
Forum: KXStudio Discussion
Topic: List of JACK Frame & Period settings ideal for USB interface
Replies: 14
Views: 7066

List of JACK Frame & Period settings ideal for USB interface

(This was split off by me from the SP/DIF discussion as it seemed appropriate to place this into its own thread.) Since in Cadence you can over-ride the drop-down menu selections and type-in your own custom frames entry, you can enter the numbers below and thus achieve an even multiple of 1ms (that ...
by tbritton
Thu Feb 21, 2013 2:25 am
Forum: Computer Related Hardware
Topic: Focusrite Scarlett 2i4 - success!
Replies: 53
Views: 50358

Re: Focusrite Scarlett 2i4 - success!

In the case of USB, JACK works best if the software latency is a multiple of 1ms. You can only achieve this if the sample rate is 48kHz, 96kHz or 192kHz BTW - It seems that 44100 actually does have two frame rates that come out even for USB! (Not sure these would really work in practicality...) 147...
by tbritton
Thu Feb 21, 2013 2:21 am
Forum: Computer Related Hardware
Topic: Focusrite Scarlett 2i4 - success!
Replies: 53
Views: 50358

Re: Focusrite Scarlett 2i4 - success!

I entered the forumla (frames/sample rate)*period into a spreadsheet and found some interesting numbers for both 2 and 3 periods that make even multiples of 1ms for USB use in Cadence, taking advantage of the ability to enter arbitrary numbers in there. To avoid a double post, here is the spreadshee...
by tbritton
Tue Feb 19, 2013 7:44 pm
Forum: KXStudio Discussion
Topic: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KMix
Replies: 17
Views: 10346

Re: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KM

Thanks, falkTX. So, the numbers to go with are the ones the formula derives, then. That is handy to know!

Terry
by tbritton
Tue Feb 19, 2013 6:54 pm
Forum: KXStudio Discussion
Topic: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KMix
Replies: 17
Views: 10346

Re: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KM

That formula is applicable to all sound cards, btw - but the 1ms trick is USB specific.... It's about polling rates IIRC. USB was never intended for realtime stuff..... We just get away with it thanks to excess bandwidth ;) Ahh! Well, I'm not surprised hearing that. I wonder why Cadence reports a d...
by tbritton
Tue Feb 19, 2013 6:46 pm
Forum: KXStudio Discussion
Topic: Why people dont like KDE ?
Replies: 56
Views: 9586

Re: Why people dont like KDE ?

i2productions wrote:
riffmastergeneral wrote:is it that people dont like KDE ?

One reason. Bloated (yes more than gnome)


Didn't your mother or a girlfriend ever tell you it is not polite to use the word "bloated"? Not ever? In any context? ;-)

Terry
by tbritton
Tue Feb 19, 2013 8:06 am
Forum: KXStudio Discussion
Topic: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KMix
Replies: 17
Views: 10346

Re: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KM

AutoStatic just helped me out hugely by sharing this post: http://www.linuxmusicians.com/viewtopic.php?f=6&t=10142&p=37495#p32773 He explains the formula for USB devices. (frames/sample rate)*period = theoretical latency. With USB devices, he says, you want this number to be an even multiple...
by tbritton
Tue Feb 19, 2013 7:55 am
Forum: Computer Related Hardware
Topic: Focusrite Scarlett 2i2
Replies: 12
Views: 25978

Re: Focusrite Scarlett 2i2

See this post: http://www.linuxmusicians.com/viewtopic.php?f=6&t=10142&p=37495#p32773 And my response to that: http://www.linuxmusicians.com/viewtopic.php?f=6&t=10142&p=37495#p37495 It shows how to "do the math" to compute the frames buffer, periods and sample rate together...
by tbritton
Tue Feb 19, 2013 7:43 am
Forum: Computer Related Hardware
Topic: Focusrite Scarlett 2i4 - success!
Replies: 53
Views: 50358

Re: Focusrite Scarlett 2i4 - success!

Wow, that's nice to know! That means the Scarlett can achieve lower latencies than my revered UA-25 and probably with lower DSP load too. So in case I'd need a replacement I know where to look ;) I just used your calculations and set the FocusRite 2i2 USB interface to 24 frames, 2 periods at 48000 ...
by tbritton
Mon Feb 18, 2013 2:33 pm
Forum: KXStudio Discussion
Topic: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KMix
Replies: 17
Views: 10346

Re: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KM

I just figured the gui version of alsamixer reads and writes the config file for you. Which one is it for alsamixer? And where is it? I'll look for the version you mentioned. EDIT - looked it up - what the heck is this thing??? http://www.gnu.org/software/ncurses/ I ran away with my tail between my ...
by tbritton
Mon Feb 18, 2013 1:44 am
Forum: KXStudio Discussion
Topic: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KMix
Replies: 17
Views: 10346

Re: Enable S/PDIF PCM with JACK Audio by adding IEC958 in KM

Thanks, Todd! I turned it off in Kmix and installed alsamixergui and switched it on. I'm not sure what the benefit is over using Kmix but I was concerned that I was seeing xruns pop up the other way. Only one so far - with the same settings - using alsamixergui. Is it routing things differently? Terry
by tbritton
Sat Feb 16, 2013 4:28 pm
Forum: KXStudio Discussion
Topic: KXStudio needs a P.R. person
Replies: 24
Views: 5865

Re: KXStudio needs a P.R. person

I'm on the team for the open-source CamStudio screen recording application for Windows as a help-desk guy for a few years now. I got into that because a) I believed in the "mission" of the software, b) really respected the project leaders and programmers and c) naturally shared from a new ...

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