Removing Power Line Hum in GarageBand

I had made a video on removing hum in Soundtrack Pro a long time back. Last night I found I had never shared a version I made where I replicated the process in GarageBand for my author friend, Jake Bible.  So I tossed the video into FCPX to put a title and introduction on it then sent it on up to YouTube.


I cover how to remove power line hum, (120Hz) from audio using GarageBand. The technique is useful for removing any constant frequency from your audio. You can find Dead Mech at

Compressor 4 – Distributed Processing

I tossed together a video tutorial on using multiple macs to do distributed processing with Compressor 4.

I found that Compressor 4 cannot talk to qmaster nodes on older macs running Compressor 3.5.  And in the case of my 1st generation mac mini it won’t install Compressor 4 from the app store.  BUT I did find I could drag Compressor 4 to my mac mini manually and run it as a services only C4 qmaster node.  Thus I still get to use it for extra processing power in my Compressor 4 cluster.

Repairing Clipped Audio

I walk through how I use Soundtrack Pro with Bias Soundsoap to repair some podcast audio. The audio came in clipped but not distorted so badly as to be unusable. I originally did it the hard way using Soundtrack Pro’s “Clicks and Pops” tool. That took hours. Then I remembered Soundsoap has a feature to remove clicks. We dial down the noise handling part and use just a touch of the click removal and it works well and quickly.

iPad as a Podcast Skype Source

I was doing some experimenting for a friend over the weekend. It is common to run skype on a second computer when podcast recording and take the in/out audio from the second computer, usually a laptop, into a channel on a mixing board. Then you use mix minus to ensure the person on skype can hear everything but themselves. What if you don’t have a second computer BUT you do have an iPad? This is still assuming you have a mixing board of course.


Just attach the USB Apple Camera Connector Kit adapter to your iPad.


Next attach a Griffin iMic to the USB Camera Connector Kit adapter.


Hook it into your mixing board via the in and out ports on the iMic to the appropriate jacks on your mixing board. Start Skype and it will send its audio to the iMic appropriately split to the in/out ports of the iMic.


Congrats you are using Skype running on your iPad mixed into your audio for your show.

Apple iDevices and Audio Recording – Pulling out what is left of my hair out.

Ever since I got my first iPhone, the 3GS, I have wanted to use it to record audio. ??I have been in podcasting since it started. ??Six years ago. ??Not the five Apple tried to claim in iTunes. ??Five is how long they have had it in iTunes.

I also had gotten an Owle Bubo ( for Christmas last year. ??It is a great camera grip and comes with the Veracorder mic to better aim your audio when making video. ??The veracorder mic is below. ??It’s short and can be bent to angle toward your source. ??It works on the iPhone3GS but has been broken on the iPhone4. ??


Combined with the FiRE field recorder app ( it makes a great hand recorder for questions, notes etc. ??Especially since the FiRe app supports the Izotope ( audio processing plugins like Noise Gate, Hiss Reducer. ??Sure you can only use one at a time but its cool for field use. ??Even better is you can turn on pass through audio. ??Where I am going is I wanted to be able to use my iPhone or now iPad as an inline noise gate for my sound board. ??Why not? ??I have it so why not use it?

To this end I needed a way to split audio in and out. ??So I originally picked up a splitter cable from?? ??This was made to work with the iPhone. ??But it never would override the internal mic. ??Now I find it works on the iPad. ??I tried it again with the iPhone4 with little joy.


Next I go for the Griffin iMic. ??The device itself works on the iPad and briefly FiRe recognized it fully and pass through audio worked. Then it quit. ??Recording then playback can be heard through the output. ??But the live pass through quit for a reason I cannot explain. ??I have emailed the developer of FiRe. ??I also find I cannot try it on iPhone 3GS or 4. ??Because those reject the camera connector kit plug. ??This is really irritating since I know that the iPhone4 changed the audio on the dock connector to be usb audio device. ??So if Apple would just let the camera kit usb plug work I am betting the griffin imic will work fine. ??All avoiding the inconsistent nightmare that is the headphone jack. ??


In a nutshell which is appropriate since the changes and inconsistency are driving me nuts, get your act together Apple. ??PLEASE!