electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Articles  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links  |  Store
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
Live streaming at radio.electro-music.com

  host / artist show at your time

poster

Please visit the chat
 Forum index » How-tos » Production - engineering/mixing
How To Test Audio Equipment?
Post new topic   Reply to topic
Page 1 of 1 [6 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
migraneboy



Joined: Dec 25, 2006
Posts: 13
Location: Finland

PostPosted: Mon Jan 22, 2007 2:55 am    Post subject:  How To Test Audio Equipment? Reply with quote  Mark this post and the followings unread

I couldn´t find a decent site about this topic, so please share your wisdom!

Im having serious doubts that somethings wrong with my gear, so I would like to know what type of testing can be done at home to find out whats going on in my preamps or soundcard ect...


Some of the inputs on my preamp sound different when they should be identical, and I also think that my soundcards L+R outputs have started to sound different..

What might be the best method of testing to find out whats going on?
I´d like to findout the exact dB and Hz values of the "anomalities" so I might be able to somhow compensate them..

Thanks for your suggestions
Back to top
View user's profile Send private message
andrewF



Joined: Dec 29, 2006
Posts: 1176
Location: australia
Audio files: 4

PostPosted: Sun Feb 25, 2007 10:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

hi I'm no expert on these things
but this link was recently posted on s-diy
it may help you out

http://techmind.org/audio/
Back to top
View user's profile Send private message Visit poster's website
migraneboy



Joined: Dec 25, 2006
Posts: 13
Location: Finland

PostPosted: Mon Feb 26, 2007 2:41 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks andrewF!

Looks like a good tool, I´ll try it out!
Back to top
View user's profile Send private message
mosc
Site Admin


Joined: Jan 31, 2003
Posts: 17902
Location: Allentown, PA
Audio files: 147
G2 patch files: 60

PostPosted: Mon Feb 26, 2007 10:55 am    Post subject: Reply with quote  Mark this post and the followings unread

Visual Analyser 8- http://hacca.altervista.org/ - is and excellent program you should also check out. A lot of people here have had good luck with this one.

Unfortunately, imbalance between L and R channels is too common on even expensive equipment. Most people take it for granted that the channels match, but often they don't, even when the equipment is new.

You can rig up a synth to act as an external test tone generator. It doesn't matter what you use as long as the output is constant. Plug it into both channels and do a spectrum analysis and check the gains. I'm not sure that the manufacturers test products very carefully. They assume most consumers can't tell the difference anyway.

For practical purposes its OK if there are some minor variations. But, if you hear differences then your gear either needs to get fixed or replaced. Hearing is the most important test - but you are right to want to get an accurate independent analysis.

_________________
--Howard
my music and other stuff
Back to top
View user's profile Send private message Send e-mail Visit poster's website AIM Address
migraneboy



Joined: Dec 25, 2006
Posts: 13
Location: Finland

PostPosted: Tue Feb 27, 2007 4:51 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks!

Good tip! It should prove useful for lots of different testing.. Going thru my preamps should be easy cos they go thru A/D conversion so theres nothing colouring the sound after the pres.

I guess I might be able to test my soundcard L+R outputs with that program also.

Maybe if I use the whitenoise-function and route the soundcard outputs straight back into the inputs, record it and check for differences in level and frequencyresponce between the two I might find out whats going on. Then again, if my soundcards stereo analog input is bust I cant say if it´s the output or input that has the problem, or both! Smile

For testing my speakers I think I need that whitenoise again, record it thru the left speaker with a decent mic in front of it, then put the right speaker in the exact same place and do it again. I should be able to see the possible differences in their sound by comparing these two files, right ?

Im using a RME Digi 96/8 soundcard, a focusrite octopre and Genelec speakers. Im in the middle of moving house, so before I start measuring the room for acoustics and even think about diffusors or anything I think I need to know that the source is working like it should.

Thanks again for the link, gotta love free stuff!
Back to top
View user's profile Send private message
mosc
Site Admin


Joined: Jan 31, 2003
Posts: 17902
Location: Allentown, PA
Audio files: 147
G2 patch files: 60

PostPosted: Tue Feb 27, 2007 12:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

That method for checking your speakers should be illuminating.
_________________
--Howard
my music and other stuff
Back to top
View user's profile Send private message Send e-mail Visit poster's website AIM Address
Display posts from previous:   
Post new topic   Reply to topic
Page 1 of 1 [6 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » How-tos » Production - engineering/mixing
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
e-m mkii

Please support our site. If you click through and buy from
our affiliate partners, we earn a small commission.


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use