The poster is using a Zoom H2n. However we have not been able to recommend highly enough using our Audiobook Mastering and they are using their own mastering process.
There's an error or omission in the Noise instructions. Drag-select the sample background noise and make that the Profile. Then select the whole clip or show by clicking just right of the up arrow. http://www.kozco.com/tech/audacity/pix/JusttRightOfTheUpArrow.jpg Then Effect > Noise Reduction > 6, 6...
Audacity 2.3.1 is a fully qualified 64-bit application and shouldn't have any more trouble than any other normal Mac app. There has been some serious trouble between iTunes, AAC/M4A, Audacity and FFMpeg. You broke the format! No, you! Not my problem!! "789:57:13" is iTunes-speak for Someth...
They don't make the Zoom H4 any more. That one is a legacy model and it's feeling its age. There was a poster on the forum using either an H4n or an H2n. They gave up trying to force their computer to work. I need to look.
As above, I would stay with the microphone, but change the interface. There's a new one from Rode I need to research. I think I like it because they actually publish technical specifications right there on the page. It's not missing or hidden at the bottom of a collection of adorable animations desc...