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#1
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![]() Member ![]() ![]() Group: Members Posts: 66 Joined: 11-Oct 04 From: - PT Member No.: 52,995 ![]() |
Hi
I've noticed this problem: I have a Powerbook g4 15" OSX 10.4.4, a Lacie Firewire external disc, a Terratec Phase 24 firewire soundcard, an M-Audio Midisport 4x4 midi interface, a Clavia Nord Lead, a Waldorf Xtk, Yamaha Fs1r, Oberheim Matrix 1000 and an Yamaha 01V digital mixer. The digital out of the mixer is connected to the digital in of the soundcard. In Logic Pro 7.1, when I record the stereo out of the mixer thru the digital cable (spdif) into the soundcard I get cracks and pops. I'm always recording to the external disc (7200rpm). I've tried the Powerbook's hard disk and I get the same problem. Usually the recorded file sounds good at the beginning, but after some minutes it starts to have those cracks and glitches. And I'm sure they're recorded. It´s not a playback problem. I'm recording at 24bit 44100hz. I've tried recording second time and it had no cracks and pops ! Does Logic need to play all the song before it is recorded ? Do I have something wrong on my preferences ? Is this a bug ? I've also noticed that when I use Kontakt 2 and I play a song for the first time, as soon as the song pointer reaches the Kontakt notes Logic stops with the following message: " CoreAudio System Overload.The audio engine was not able to process all required data in time.(-10011)". When I play the song the second time, Kontakt plays with no problems and the song doesn't stop. Is this related to the cracks and glitches problem in some way ? What do you think ? Thank you. Alex |
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#11
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![]() Member ![]() ![]() Group: Members Posts: 66 Joined: 11-Oct 04 From: - PT Member No.: 52,995 ![]() |
QUOTE (Metro SE @ Feb 26 2006, 02:03) QUOTE (camarao @ Feb 25 2006, 14:01) 1 - delay compensation ? It is not delay compensation. Why not connect both Digital cables and try inverting the master and slave relationship between the audio device and the Mixer? I think I'll try that. |
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#12
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![]() Member ![]() ![]() Group: Members Posts: 66 Joined: 11-Oct 04 From: - PT Member No.: 52,995 ![]() |
QUOTE (lepetitmartien @ Feb 26 2006, 04:24) And verify everyone agrees to work at the same bit/KHz (both on the yam and in the mac, in logic, in audio MIDI setup and the sound pref panel). that was the first thing I was sure to be ok. |
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#13
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![]() Member ![]() ![]() Group: Members Posts: 66 Joined: 11-Oct 04 From: - PT Member No.: 52,995 ![]() |
I think I've tried everything...I even get the same problem when recording thru the analog inputs ! That's not a digital issue, I think.
I'm completely lost and I don´t know what to do else... It's a question of luck, unfortunely. Sometimes I get good recordings, other times I get terrible ones. I'v tried to record with other software also like Ableton live and Dsp Quattro. I've changed the firewire cables. I've changed the way they connect to the Powerbook...The problem persists. Maybe I have a defevtive unit or maybe this card wasn't designed to be used with Macs. |
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#14
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![]() Moderator In Chief (MIC) ![]() Group: Editors Posts: 15,189 Joined: 23-Dec 01 From: Paris - FR Member No.: 2,758 ![]() |
Time to bother the interface makers
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#15
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![]() Member ![]() ![]() Group: Members Posts: 66 Joined: 11-Oct 04 From: - PT Member No.: 52,995 ![]() |
QUOTE (lepetitmartien @ Mar 12 2006, 02:17) Time to bother the interface makers ![]() ![]() Yes. I've sent them an email complaining already. Let's see how long it takes to answer me.. |
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#16
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![]() Member ![]() ![]() Group: Members Posts: 66 Joined: 11-Oct 04 From: - PT Member No.: 52,995 ![]() |
QUOTE (camarao @ Mar 12 2006, 11:17) QUOTE (lepetitmartien @ Mar 12 2006, 02:17) Time to bother the interface makers ![]() ![]() Yes. I've sent them an email complaining already. Let's see how long it takes to answer me.. There is one thing I've noticed: I get many times a message about a error with midi and audio sync, and that it recognizes a strange sample rate. Maybe there is something wrong about the Mac's Audio Midi settings... |
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#17
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![]() Member ![]() ![]() Group: Members Posts: 66 Joined: 11-Oct 04 From: - PT Member No.: 52,995 ![]() |
I FOUND IT !!! And it's unbelievable !
Any time my fridge starts , or my heater or a more strong lamp, there is a strange sample rate recognized ! That is why the bad recordings seemed so unpredictable. It seems the electricity is interfering with the sound card. Is there something I should do to protect my soundcard from being interfired by electricity ? This is a strange thing... |
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#18
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![]() Newbie Group: Validating Posts: 21 Joined: 18-Dec 05 From: Albuquerque - US Member No.: 74,080 ![]() |
You must be a very observant musician!!! You found the SOURCE of the noise, but it's maybe not the problem?
I know nothing about household electricity in your home country, but I know a little about unwanted analog signal (NOISE), caused by unbalanced current or electricty. When your fridge (or other "load" on your household current) starts up, it changes the household current, which has its own, essentially, analog signal. The household current becomes "unbalanced" in relationship to your home grounding system. Especially with motors or other high amp draw home appliances, this can be a problem. Somehow this imbalance is finding its way to your recording equipment? Short of hiring an electrician (not yet anyway), if you were recording OK before & this recording noise is new, did you add a new piece of equipment, or cable, or electrical power strip? Something as simple as a ground connection gone bad in a TRS cable, or jack can act as an antenna... or a component in an amp or something? Maybe you rerouted your cables to hook up new equipment and have the power and audio (digital or analog) cables laying side by side? The noise problem is very believable. You are too cool for finding & recognizing the source! Professional studios spend much time and money to eliminate noise, especially electrical noise. If you're interested in a good technical read on the subject- http://www.equitech.com/articles/enigma.html Let us know what you find & good luck. RECORDING NOISE This post has been edited by jce44: Mon 20 Mar 2006, 17:29 -------------------- dB= deciBell. (CAPITOL "B") In honor of Alexander Graham...
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#19
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![]() Member ![]() ![]() Group: Members Posts: 66 Joined: 11-Oct 04 From: - PT Member No.: 52,995 ![]() |
QUOTE (jce44 @ Mar 20 2006, 16:02) You must be a very observant musician!!! You found the SOURCE of the noise, but it's maybe not the problem? I know nothing about household electricity in your home country, but I know a little about unwanted analog signal (NOISE), caused by unbalanced current or electricty. When your fridge (or other "load" on your household current) starts up, it changes the household current, which has its own, essentially, analog signal. The household current becomes "unbalanced" in relationship to your home grounding system. Especially with motors or other high amp draw home appliances, this can be a problem. Somehow this imbalance is finding its way to your recording equipment? Short of hiring an electrician (not yet anyway), if you were recording OK before & this recording noise is new, did you add a new piece of equipment, or cable, or electrical power strip? Something as simple as a ground connection gone bad in a TRS cable, or jack can act as an antenna... or a component in an amp or something? Maybe you rerouted your cables to hook up new equipment and have the power and audio (digital or analog) cables laying side by side? The noise problem is very believable. You are too cool for finding & recognizing the source! Professional studios spend much time and money to eliminate noise, especially electrical noise. If you're interested in a good technical read on the subject- http://www.equitech.com/articles/enigma.html Let us know what you find & good luck. RECORDING NOISE noise? I was not complaining about noise... But thank you, anyway. |
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#20
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![]() Advanced Member ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 348 Joined: 10-Feb 06 From: Hamburg - DE Member No.: 76,633 ![]() |
Camaro... Great advice. Just to add to your reply: "Don't try it yourself... Zap... Crack... Pow... Studio Gear For Sale... Previous owner Gone!
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