Using Mixxx 1.11.0-beta2 (Intel Core2 Duo iMac, OS X 10.8.5) with an iLive IAB13B bluetoothe adapter causes stuttered audio output. There's a constant ticking sound that gets less severe as the latency setting is lowered. Severity of the "ticking" in the audio increases with increased audio file sample rate and cannot be eliminated in 320kbps mp3s. The frequency of the ticking changes with changing the sample rate setting. All together the ticking seems to be a function of sample rate setting, latency setting, and sample rate of the audio file as no single setting eliminates the ticking for all audio files and the frequency and severity of the ticking fluctuates from file to file. When using the iLive bluetoothe device with iTunes, there is no ticking at all on any tracks so I suspect it's a problem with Mixxx.
Are you using multiple outputs (i.e. main speakers for the master output, bluetooth for the headphone output)? You are likely seeing: https:/
What happens when you adjust the latency?