help with 828mk2 needed

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Discussion related to installation, configuration and use of MOTU hardware such as MIDI interfaces, audio interfaces, etc. for Mac OSX
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afionidos
Posts: 5
Joined: Thu Aug 24, 2006 7:13 am
Primary DAW OS: Unspecified

help with 828mk2 needed

Post by afionidos »

hi there.
i have the 828mk2 usb and i use it with a macbook and logic pro.
i thought it was the perfect interface until i had some serious issues.

1.no matter what sample rate i have selected,when i start up logic it goes to 48k
2.this is a serious one. no matter how many channels i record simultaneously,i have cracking and hamming recorded in the audio files (!).
i mean ,while i'm recording it seems as everything is ok but when i playback the recorded audio files they have -very audible- noise,pops,cracks - you name it.

here is an example

*edit here is a more obvious example

i changed the usb cord,every usb port but the problem persists.
help,i don't want to send it back :roll:
Last edited by afionidos on Tue Jun 19, 2007 7:00 am, edited 1 time in total.
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Pappy725
Posts: 825
Joined: Sat Oct 16, 2004 10:01 pm
Primary DAW OS: MacOS
Location: Hill Country of Texas

Post by Pappy725 »

I have the mkII also, while I haven't had the crackling problem I have heard that they are sensitive to voltage flucuations. A power conditioner might solve your problem. Furman makes several models.

HTH,
Stephen
MacBook Pro (Retina, 15-inch, Early 2013)
2.4 GHz Intel Core i7, 8GB RAM, OS High Sierra 10.13.2, DP8.07, 256GB SSD
828mkII, 8Pre, Alesis M1 Active Mk2, Ext. FW drives, Yamaha fretless bass, Kay upright bass, Wechter acoustic/electric, trombone, baritone and a proclivity for polka music. (With sufficient quantities of beer) and I play country music.
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afionidos
Posts: 5
Joined: Thu Aug 24, 2006 7:13 am
Primary DAW OS: Unspecified

Post by afionidos »

thanx for your reply :D

forgive my ignorance,can i use a ups instead of a power conditioner?
i'm asking because i don't want to give 150 and find out that it didn't solve the problem,it will be pretty useless then.
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Pappy725
Posts: 825
Joined: Sat Oct 16, 2004 10:01 pm
Primary DAW OS: MacOS
Location: Hill Country of Texas

Post by Pappy725 »

I guess that would work if the ups unit keeps the output voltage at 120. I'm not sure that they work that way, more of a surge protector type unit I thought. I have seen this problem with MIDI units when I do live sound and the electricity is flucuating. Some units quit immeadiately.
Check the web, there should be some deals on power conditioners out there.
Stephen
MacBook Pro (Retina, 15-inch, Early 2013)
2.4 GHz Intel Core i7, 8GB RAM, OS High Sierra 10.13.2, DP8.07, 256GB SSD
828mkII, 8Pre, Alesis M1 Active Mk2, Ext. FW drives, Yamaha fretless bass, Kay upright bass, Wechter acoustic/electric, trombone, baritone and a proclivity for polka music. (With sufficient quantities of beer) and I play country music.
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CMurph
Posts: 12
Joined: Wed Dec 13, 2006 6:12 am
Primary DAW OS: Unspecified

Post by CMurph »

What is your buffer size set to in Logic when this occurs? Does the crackling happen when you play iTunes or something through the 828?

Your 828 is switching sample rates because your Logic project is set to 48, most likely.
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afionidos
Posts: 5
Joined: Thu Aug 24, 2006 7:13 am
Primary DAW OS: Unspecified

Post by afionidos »

CMurph wrote: Your 828 is switching sample rates because your Logic project is set to 48, most likely.
lol .it's almost embarassing but i admit that was the problem (!).
i had never changed the sample rate in logic or motu,i don't know what it happened to my autoload. thanx

it doesn't matter how much latency i have or how many tracks i record simultaneously. this ranom dc buzzing persists. i'll buy a ups and i'll give feedback
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