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Recording audio

Discussion in 'Hobby Electronics' started by Jackie, Aug 1, 2003.

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  1. Jackie

    Jackie Guest

    What would be the easiest/cheapest way to record 2 stereo audio channels
    in .wav format straight onto a PC?

    2 sound cards into what ?

    Don't need/want expensive progs like Cool Edit Pro etc!

    Jackie
     
  2. Hi Jackie,
    This isnt the best place for you to be asking this question, but anyway,
    what is it you are trying to achieve?
    A total of four tracks in perfect sync?
    You might 'need' something like CEP and probably one card with four inputs
    becauce to cards 'will not' be in sync for long.
    I'm sure ( with two stereo cards) you can open two versions of their
    recording software and assign a different card to each and record at the
    same time though.

    Mark K.
     
  3. Jackie

    Jackie Guest

    Thanks Mark,

    I also asked the question on rec.audio but did not get a response.

    I prefer to use the aus newsgroups when I can, because we Aussies must
    stick together!!

    I don't really need perfect synch because I can synch in my editing
    software. Just wanted the cheapest way to do it rather than spend big
    money on CEP!

    Regards,
    Jackie
     
  4. Jackie

    Jackie Guest

    Hi Mark,

    Basically, I want to record 4 independent audio channels of an amateur
    stage production and then import the audio channels into video editing
    software - with the video from the camera. The video editing software
    will allow me to synch the audio with the video.

    My preference was to record the 4 channels direct to a PC's hard drive
    and I wanted the cheapest way to do this without having to purchase an
    expensive package like Cool Edit Pro. etc.

    I want editing control over the individual audio channels rather than a
    mix of the lot.

    Was hoping there might be an easy way to do this audio recording.

    Regards,
    Jackie
     
  5. Guest

    Guest Guest

    Since it is a stage production, I presume you want 4 mono channels which
    is 2 stereo channels. I've used Linux as a recording platform for a single
    stereo platform and found it pretty good providing you follow a few rules.
    There is plenty of software available, you don't need anything fancy for
    merely recording.

    * Use a SCSI drive because interrupt load is much lower.

    * Record to a raw partition (no filesystem, much more efficient).

    * Open the file in synchronous mode (i.e. all writes must sync) and
    write approx 1k blocks.

    * Don't do network I/O at the same time, bring down network interfaces,
    unplug the network.

    I've recorded over an hour in a single take without problems using
    old, slow hardware. I'm pretty sure that newer hardware could handle a
    pair of soundcards or a single 4-channel card without a hassle.
    Well I've explained the recording. For the editing it is another issue.
    I generally use a simple "dd" command to pull the audio off the raw partition
    and into a regular file, you have to guess at where the end of the recording
    is but there is always cutting and stuff to do later so it doesn't matter
    if you get the end exactly right.

    For actually editing, cutting, pasting and mixing there are quite a
    few Linux options. The most basic is "sox" which will do everything but
    can be a bit tedious to use. A bit of a search around should turn up
    some "GUI" programs to do this stuff.

    Getting it all into sync is something you will just have to do by ear.

    - Tel
     
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