WaveRecorder (com.fognl.android.apps.yaar) on Google Play
WaveRecorder is a basic audio recorder that lets you record from various audio sources on your Android phone and specify a sample rate, output file type, and an optional time limit. Nice for recording voice memos, etc.WaveRecorder supports WAV, OGG, and AAC recording at this point. It's made specifically for Android 5.0, and has been tested on various Nexus devices.