Search found 594 matches

by merlyn
Thu Mar 26, 2020 12:13 pm
Forum: System Tuning and Configuration
Topic: measured rtl twice as high as calculated one
Replies: 7
Views: 252

Re: measured rtl twice as high as calculated one

If we consider the case with JACK first : Reaper and QjackCtl agree on the latency -- it's ~4.3ms. This is calculated from ((number of periods) * (samples per period)) / sample rate. In this case : (3 * 64) / 44100 = 4.35 ms jack_iodelay reports that the actual, measured round trip latency is ~12.4 ...
by merlyn
Tue Mar 17, 2020 10:31 am
Forum: Linux Music News
Topic: JJazzLab 2.0 is out !
Replies: 17
Views: 927

Re: JJazzLab 2.0 is out !

I don't have jjazzlab in front of me.

sus2 is an inversion of sus4. Gsus4 (G C D) = Csus2 (C D G). So if you can specify inversions use Gsus4/C for Csus2.
by merlyn
Tue Mar 10, 2020 6:03 am
Forum: Recorders & Sequencers
Topic: Compatibility of USB audio sound card BOSS ME-80
Replies: 6
Views: 260

Re: Compatibility of USB audio sound card BOSS ME-80

Jack can manage multiple interfaces(, if that was the question). I was going to get to that once it was verified the ME-80 was working with JACK. To clarify this : JACK can only use one sample clock at a time. Using multiple devices involves a master/slave type of setup, with e.g. audioadapter prov...
by merlyn
Tue Mar 10, 2020 5:06 am
Forum: Recorders & Sequencers
Topic: Compatibility of USB audio sound card BOSS ME-80
Replies: 6
Views: 260

Re: Compatibility of USB audio sound card BOSS ME-80

So to end this message: I think that the ME-80 USB audio interface is only partly "supported" by the "default USB drivers" of Raspbian/Linux. The good news is it's likely that you're completely wrong :) The ME-80 appears in proc/asound/cards . I think you want to use the Scarlett and the ME-80 at t...
by merlyn
Mon Mar 09, 2020 5:30 pm
Forum: Your Studio & Gear
Topic: Still waffling over nearfields
Replies: 20
Views: 682

Re: Still waffling over nearfields

At best I could put the speakers about 3" apart on a desk about 4" out from the corner, right up against the wall. Your wallet may not thank me for this but 4' from the side wall is OK. I go by the guideline of 1m from the side wall and 4' is more than 1m. Put the monitors on stands at ear height a...
by merlyn
Sun Mar 08, 2020 11:02 am
Forum: System Tuning and Configuration
Topic: jack_iodelay and LSP Latency Meter
Replies: 2
Views: 103

jack_iodelay and LSP Latency Meter

I've tried comparing results from jack_iodelay and LSP Latency Meter. They're very close but not identical. Using JACK in sync mode, 48kHz, 2 periods per buffer, 64 frames per period the theoretical value for this setup is : nominal latency = ((1 + number of periods) * number of frames per period) /...
by merlyn
Sun Mar 08, 2020 5:28 am
Forum: Your Studio & Gear
Topic: Still waffling over nearfields
Replies: 20
Views: 682

Re: Still waffling over nearfields

White cones are cool. :) If I may offer a different perspective : If the layout of your room is compromised you won't get the best out of good monitors. You may get more of an improvement from dealing with the room. A corner sounds problematic. I'm only suggesting this to save you a post along the l...
by merlyn
Fri Mar 06, 2020 8:56 am
Forum: System Tuning and Configuration
Topic: MIDI events not captured consistently
Replies: 3
Views: 133

Re: MIDI events not captured consistently

It's not going to work if you have MIDI Driver : None in JACK.

You can use jack_midi_dump to see what MIDI messages JACK is picking up.
by merlyn
Fri Mar 06, 2020 7:32 am
Forum: Your Studio & Gear
Topic: Still waffling over nearfields
Replies: 20
Views: 682

Re: Still waffling over nearfields

If you have your monitors right up against a wall the bass is increased. A lot of monitors have a bass cut switch to compensate for this -- monitor manufacturers must know it's a common scenario. On the other hand if you have your monitors more than 60cm from a wall the bass will start to cancel out...
by merlyn
Tue Mar 03, 2020 4:55 pm
Forum: System Tuning and Configuration
Topic: sooperlooper latency setting help
Replies: 9
Views: 166

Re: sooperlooper latency setting help

Bit of a long shot but you could try JACK in sync mode. That gets rid of an extra buffer on the output which sooperlooper may not be aware of.

it's in QjackCtl > Settings > Use server synchronus mode.

Then restart JACK.
by merlyn
Tue Mar 03, 2020 4:28 pm
Forum: System Tuning and Configuration
Topic: sooperlooper latency setting help
Replies: 9
Views: 166

Re: sooperlooper latency setting help

So if I understand correctly I have 1 ms (input) + 1 ms (output) extra latency because I am using a soundcard that is USB 1.1? That's right. The software should be able to calculate this out. From the link you posted : If you set output latency too low, overdubs will sound like they are playing too...
by merlyn
Tue Mar 03, 2020 3:40 pm
Forum: System Tuning and Configuration
Topic: sooperlooper latency setting help
Replies: 9
Views: 166

Re: sooperlooper latency setting help

441 samples is a lot of extra latency. It's exactly 1ms at 44.1kHz, which is the latency of USB 1.1. What audio interface are you using?

EDIT : If looping is OK the input buffer is good. If overdubbing is late the output buffer is too small.
by merlyn
Tue Mar 03, 2020 2:53 pm
Forum: Newbies
Topic: Getting Delta 1010 working in Ubuntu Studio 19.10
Replies: 11
Views: 552

Re: Getting Delta 1010 working in Ubuntu Studio 19.10

You can get a test signal (pink noise) with ALSA by using speaker-test. This should work for you :

Code: Select all

$ speaker-test --device "plughw:M1010"
Use 'Ctrl-C' to stop it.
by merlyn
Tue Mar 03, 2020 2:39 pm
Forum: System Tuning and Configuration
Topic: sooperlooper latency setting help
Replies: 9
Views: 166

Re: sooperlooper latency setting help

I haven't used sooperlooper but I have used jack_iodelay . 1906.058 frames 43.221 ms total roundtrip latency extra loopback latency: 882 frames use 441 for the backend arguments -I and -O To set JACK up correctly put '441' into the 'Latency I/O' boxes on QjackCtl . Then you could try the automatic l...
by merlyn
Fri Feb 28, 2020 7:30 pm
Forum: Original Scores & Recordings
Topic: The Music of Noah's Ark and The New Ja'dahgweh
Replies: 12
Views: 292

Re: The Music of Noah's Ark and The New Ja'dahgweh

The first thing that struck me is that it sounds like you're singing and playing loud. I was impressed that you kept that level of vocals through the whole track. It's a minor point but sometimes I thought you were strumming the guitar too hard. At points the percussive attack is dominating and you ...