[LAD] Deriving a steady MIDI clock crossplatform?

Hey hey, I wonder how would you best derive a steady MIDI clock in software for a cross platform application? Cross platform in this case almost certainly means Linux and mac. I know about one or two applications that use the timeofday/sleep mechanism, but from first hand experience I know that these tend to drift and wobble. This becomes apparent when syncing a synth with clock synced delays to that clock. There is a slight chorus effect. Furthermore, subsequent renderings of the same song is too much out of sync. Exact re-runs are necessary with connected mono timbral instruments that have to contribute several sounds to the same song. I did think about using RtAudio with a very low blocksize. The callback function could supply a steady time source at the connected soundcard's samplerate (or any subdivision thereof). Is that feasible? Or will some function from any of the Boost libraries do? I haven't found the right one yet. The Thread library contains its versions of sleep (i.e. sleep_for) and other libraries supply all kinds of finely grained time formats. But apparently, they too are based on a timeofday based mechanism. Being new to this kind of task, I am a bit at a loss. So any practical pointers and hints are welcome. Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c If there's nothing missing in my life Then why do these tears come at night <3 (Britney Spears)