Here's a very cool feature of our online music creator (Roc) that you might not know about which lets you trim your beats. You can find it under the track option menu by selecting Sounds>Edit Sounds, and it'll work on all sounds: imported, recorded, and any of those in our library. It's a simple editor that lets you trim sound lengths by dragging the two end handles. You can preview and loop the sound to get the edits just right. Though it isn't a feature-rich editor, it will save you from having to open up clips in our audio editor (Myna) for simple edits.