via http://emu-russia.net/en/

ZX Spectrum emulator for Android has been updated. Changes:
- fixed loading of files with spaces in their names;
- MIDI recordings are now named after original program files;
- fixed audio latency controls. Try setting your latency to 100ms;
- fixed MIDI soundtrack logging;
- reduced minimal audio latency.
News source: http://fms.komkon.org