Echoing the parallel comment, if you're willing to get your hands into the guts, you can get amazing "RTOS-like" audio performance out of linux. I love pushing

Echoing the parallel comment, if you're willing to get your hands into the guts, you can get amazing "RTOS-like" audio performance out of linux. I love pushing the limit of how low latency can get. Start with the PREEMPT_RT patches, be sure your irqs for audio are prioritized right, then experiment with pinning individual processes to specific cores, as well as locking their address space in memory.