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| Plex_Dave | hey everyone, it's time for a new laptop for my kxstudio podcast setup. i currently have a dual core hyperthread i5 2520m in a thinkpad T520. I am looking at T560. The benchmark comparisons for the cpus show a modest gain in single thread performance and a huge gain in multi-core performance. Any thoughts on how this will translate to a complex routing setup in kxstudio's claudia? | 08:50 |
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| Arthur_D | hi all | 14:53 |
| Arthur_D | having issues recording in an application which works with PulseAudio | 14:54 |
| Arthur_D | Pulse is bridged to JACK, and most apps work fine, including recording. This one is a bit of special case | 14:54 |
| Arthur_D | the file I end up with is 5 kB in size with only silence | 14:55 |
| falktx | might not support 32bit float format | 15:00 |
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| Arthur_D | okay, the application is SuperTuxKart, we recently got support for recording video in the game itself :) | 15:05 |
| Arthur_D | so I am testing how it works, I'll tell the dev your suggestion, thanks | 15:05 |
| falktx | I might be wrong, but I think when pulse runs as slave to jack, it uses 32bit float for audio format. because that's what jack uses | 15:06 |
| Arthur_D | falktx: if you have time to look at the code we'd be very grateful, but I understand if you have other things to do | 15:06 |
| falktx | of supertuxkart? heh, I might need an entire week to understand it | 15:07 |
| Arthur_D | sure, but just the audio recording ;) | 15:07 |
| falktx | give me a link first :P | 15:07 |
| Arthur_D | of course, I'm finding it :) | 15:07 |
| Arthur_D | https://github.com/supertuxkart/stk-code/tree/advanced_recording specifically https://github.com/supertuxkart/stk-code/blob/advanced_recording/src/utils/avi_writer.cpp | 15:08 |
| Arthur_D | lines from 322 probably most relevant | 15:10 |
| Arthur_D | could it be the sample rate? I have 48000 as sample rate but the code wants 44100. But doesn't pulseaudio convert automatically? | 15:11 |
| Arthur_D | hmm maybe it's line 354 | 15:15 |
| Arthur_D | default_sink += ".monitor"; | 15:15 |
| falktx | doesn't it print an error for you? | 15:22 |
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| Arthur_D | No, unless I overlooked it | 15:43 |
| Arthur_D | I'll check | 15:44 |
| Arthur_D | doesn't seem like it | 15:48 |
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| Arthur_D | commenting out default_sink += ".monitor"; I get no audio file at all | 16:00 |
| falktx | I don't know. code has a lot of stuff that I would personally add prints and additional checks | 16:02 |
| Arthur_D | okay | 16:03 |
| Arthur_D | thanks for looking :) | 16:03 |
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| Arthur_D | falktx: I feel very stupid now, I found that the JACK sink was muted in Pavucontrol | 16:13 |
| falktx | hahaha | 16:14 |
| Arthur_D | yeah, sorry about all the trouble *goes to corner of shame* | 16:14 |
| Arthur_D | what I do want to argue is that it not recording the full length of silence threw me off | 16:15 |
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| Arthur_D | maybe that's something vorbis does if empty, dunno | 16:18 |
| Arthur_D | hmm actually no it just recorded the music I had on in Spotify :/ | 16:20 |
| Arthur_D | hmm ok changing to the sink itself, not the monitor I get the microphone input | 16:23 |
| Smilex | Hey. When using JACK, my sound will always go distorted after playing for awhile. Is there any setting I can change to make it work better? | 16:23 |
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| Arthur_D | Smilex: do you get lots of xruns? | 16:37 |
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| Arthur_D | might be worth trying to change your sample rate | 16:37 |
| Smilex | I don't know, what is a xrun? | 16:38 |
| Arthur_D | ok, do you have Cadence? | 16:39 |
| Smilex | yes | 16:39 |
| Arthur_D | if you open it you should see under JACK Status the number of xruns | 16:39 |
| Smilex | oh yeah, I have 34 | 16:40 |
| Arthur_D | if it's high you should probably change sample rate and/or latency | 16:40 |
| Arthur_D | rather buffer size | 16:40 |
| Smilex | and should I decrease sample rate^ | 16:40 |
| Smilex | ? | 16:40 |
| Arthur_D | try one at a time | 16:41 |
| Smilex | but the issue only happens sometimes, makes it difficult to test | 16:41 |
| Arthur_D | ah ok, that's annoying | 16:41 |
| Arthur_D | try increasing the buffer size as first test | 16:41 |
| Smilex | I've actually increased it to the highest amount | 16:42 |
| Arthur_D | ah ok, so that's not the issue then | 16:42 |
| Arthur_D | sometimes 44100 works better as sample rate, other times 48000 works better from what I have read, something to do with hardware | 16:43 |
| Smilex | ok thanks. I'll try it for some time | 16:44 |
| Arthur_D | I am not an expert though, so it may not help at all | 16:45 |
| Arthur_D | but trying should be harmless anyway | 16:45 |
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