4/11/11
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MacMost Now 539: Multiple Mics With GarageBand

You can record multiple microphones each into its own track in GarageBand. First you must set up an aggregate device using the Audio MIDI Setup utility. Then you need to enable multitrack recording in GarageBand and give each track a channel from the aggregate device. To get all microphones working well it takes some trial and error.

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Video Transcript: Hi this is Gary Rosenzweig. In today's episode let me show you how to record in Garage Band with multiple microphones. The first thing we need to do is looking at Applications folder under utilities for Audio MIDI setup.This is the utility you need to configure more than one microphone to be used as a sound input at the same time.Now in here you see a list of all of your input and output devices.So for instance I add a Blue Snowball microphone, it also has the iMic USB attachment here and I have got a microphone coming into that.I also have a headset,a punch on its headset that shows up labelled unknown USB audio device but it has 1 input like them and 2 outputs.Keep in mind you should be using USB mikes or a converter like iMic USB adapter to have your microphones coming to a usb.If you just plug in a standard microphone into your line input it is probably not gona work because it is not a powered microphone jack. So to use all of these three at once I need to go down to the plus button, click that to create the total Aggregate Device you can see down here at the bottom and on the right side I have aggregate device selected I can see
all of my audio inputs. I wana add the ones I am gona use.I wana do this in a certain order.I am gona select Blue Snowball first.It reaches to the top.Then I am gona add the iMic .Now notice that I have got here one device that's the two sound outputs.I want the one below that.It's the one sound input.Some devices are like that they seperate theor inputs and outputs and then here is the headset.I am going to add that and that combined is one input and two output.So have got all three of these together under the Aggregate Device. I can tweak right there and I could see them all listed under that one device. So the order of the device is important.For instance if you had a mono mic and a streo mic and you put the mono mic first that would be trap one and the streo mic would be stuck at track two and three.And you can't choose two and three for a line streo type. So you wana go with the opposite way so that you could get the tracks set right in Garage Band.Now here I am in Garage Band. I am going to go to Garage Band preferences and I am going to go to Audio MIDI. Am going to select as input aggregate device. So the next thing I am gona do is add three real instruments creating three tracks. One for each microphone.Select the first track here and under the input source on the right I am going to select which one I want. Notice that there are four different mono inputs here because we're using up all streo.That is why I put it first.So I can then choose streo one two for the Snowball and but that into one track and the input source for this one could be mono three and mono four to correspond with the other two microphones we used.The next thing and a extremely important steo is that I am gona into Track and enable Multitrack recording.It gives me a record button to the next of each of these and I could select each one so that now each one of these two microphones is recording.You can see two of them picking up my voice right now even though its accross the room.
Now even though I have recording of all three tracks and their microphoes, some of the qualities is just horrible.That's because you need to make some adjustments inside Audio Device setup and this has to be flexible.You need to kind of figure out what settings are best for different mics.So yo have the resample checkbox here. I could turn that off for the usb my iMic and try recording with those settings.And try recording with all three resamples.Also you notice that I wana go in each one I can select a format. So I could actually have tried with different format with all of these.fort yeight and fortyfour point one.You have to basically keep trying different settings between these and the resample checkbox until you're getting nice thin recording from all thee microphones. And after you adjust the settings before you record anything usually  have to go into preferences again.Change the audio output device to something else like take the system setting and after it does that change it back to the aggregate device to kind of reinitialize. I have e fventually found that setting each one to forty four point one and having none of them turn on the resample got me a nice clean sound from all three microphone and three different tracks here in Garage Band.It takes a lot of patience.Sometimes you may have to restart the garage Band for recognizing the changes that you have made to the aggregate devce. But with a little bit of trial and error I find that you could always get multiple microphones working nicely and smoothly in your own tracks in Garage Band. Till next time this is Gary Rosenzweig.

Comments: 43 Responses to “MacMost Now 539: Multiple Mics With GarageBand”

Crystal

14 years ago

This video was incredibly helpful, thank you very much. It worked well for me. The tip about changing the audio input setting in GB to reset was particularly helpful.

James

13 years ago

Thanks Gary. I've been sweating about making this work and switching the resample options is helpful. Do you have any advice about two Blue Snowflake mics becoming awful and electronic after a few minutes? Any help would be great.

Comments: 43 Responses to “MacMost Now 539: Multiple Mics With GarageBand”

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