Audio Editor HD is a versatile multi-track audio editor available for iPhone. With this app, you can easily add background music to your recordings or mix different instruments together. Whether you're a professional musician or just someone who enjoys editing audio, Audio Editor HD has the tools you need.

One of the main features of Audio Editor HD is the ability to record audio using your device's microphone or import audio from iTunes or your cloud drive. Once you have your audio, you can edit it using common editing functions such as cut, copy, paste, undo, and redo. The app also offers simple effect processors like tempo, pitch, fade in, fade out, gain, and noise reduction.

Managing your tracks is made easy with Audio Editor HD. You can adjust the volume of each track, as well as solo or mute individual tracks on the track panel. To align audio on different tracks, you can insert silence or simply drag and drop tracks using the one-finger-long-press gesture.

What sets Audio Editor HD apart is its try-before-payment approach. You can explore and experiment with all the features before committing to a payment and mixdown. If you decide to subscribe, the cost is $9.99 per year. Please note that payment will be charged to your iTunes Account upon confirmation of purchase, and the subscription automatically renews unless you turn off auto-renewal at least 24 hours before the end of the current period.