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I have a CASIO CTK-6200 and I've been testing its line outputs. Used a cable and connected to my mobo (Gigabyte 990XA UD3). The quality of audio is pretty decent. I'm going to buy a mic now, and since there are models with USB port, I was wondering if is it necessary to get an audio interface.

Ofc there is the delay issue, but I'm not intending to play and sing at the same time, but to edit each part carefully.

So, should I spend money on an audio interface?

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If you are going to record keyboard and lyrics separately, that means that you'll be replaying the keyboard while recording the lyrics. An USB mic is only a recording interface, so you'll have to have a separate playback interface, and USB mics are primitive enough that you cannot synchronize them to external clocks. So your microphone recording will be recorded with a different clock than the replay of the keyboard recording happens and that means that your recordings will drift apart. This does not happen when recording with the same sound card you are recording on: in that case replay and recording clock are synchronous.

This is a recipe for headache, so I'd rather strongly suggest getting an external soundcard with microphone input (and headphone output, but that's pretty much available everywhere) and capable of full duplex recording at the quality you aim for, and then use a proper analog microphone rather than one having a built-in USB interface.

Many soundcards already come with some trial software for multitrack recording: that may be convenient to start with as well.

  • Can't I simply adjust the tracks times in the DAW? I actually never recorded mic before so, I'm not aware of these problems... – RogellParadox Feb 25 '18 at 19:25
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A USB mic IS an audio interface.. If you are just recording for your own practice and not publishing it or anything and it sounds good to you then sure save some money and wait until you feel it's practical for you to buy one.

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