Even if you have 128 channels set in Preferences, Sibelius can only handle so much. Vienna Library Sounds Super Package (please have a look into my above decribed configuration). No other apps than Sibelius and Vienna Ensemble Pro Server running. Mac Pro late 2013, 2.7 GHz, 12-Core Intel-Xeon E5, 64GB 1867 MHz DDR3, 1TB SSD, externes Thunderbolt Dock (Blackmagic) mit RAID 0 4x1TB SSD (Vienna Super Package) Since the machine is frozen during this time it is not possible to change noteheads with two-digit numbers because the maximum interval for entering the two digits is exceeded. If the 'playback when editing' option is on, it also takes multiple seconds until the sound is played when editing. THE LONGER THE SCORE THE LONGER THE FREEZE UNTIL PLAYBACK. Playback is terribly delayed! After pressing the space bar it takes up to 25 (!) seconds until the playback starts. Using the VSL Soundsets I am working with Sibelius 7.5.1 on a score for orchestra (100+ instruments). 7.5: freeze before playback - Hanspeter Kyburz, 08 Aug 06:14AM 7.5: freeze before playback - Hanspeter Kyburz, 08 Aug 06:21AM 7.5: freeze before playback - Bob Porter, 08 Aug 12:24AM 7.5: freeze before playback - Sam at Sibelius, 07 Aug 09:27PM 7.5: freeze before playback - Hanspeter Kyburz, 07 Aug 09:18PM 7.5: freeze before playback - Bob Porter, 07 Aug 05:55PM 7.5: freeze before playback - Hanspeter Kyburz, 06 Aug 06:25PM 7.5: freeze before playback - Bob Porter, 06 Aug 05:13PM 7.5: freeze before playback - Hanspeter Kyburz, 05 Aug 09:10PM 7.5: freeze before playback - Bob Porter, 05 Aug 07:06PM 7.5: freeze before playback - Andreas Olszewski, 05 Aug 02:27PM 7.5: freeze before playback - Hanspeter Kyburz, 05 Aug 11:31AM 7.5: freeze before playback - Sam at Sibelius, 05 Aug 11:25AM 7.5: freeze before playback - Hanspeter Kyburz, 05 Aug 11:20AM 7.5: freeze before playback - Sam at Sibelius, 05 Aug 10:55AM

7.5: freeze before playback - Hanspeter Kyburz, 05 Aug 10:44AM 7.5: freeze before playback - Sam at Sibelius, 05 Aug 10:14AM 7.5: freeze before playback - Hanspeter Kyburz, 04 Aug 09:33PM

7.5: freeze before playback - Hanspeter Kyburz, 04 Aug 09:01PM 7.5: freeze before playback - Bob Porter, 04 Aug 08:01PM

7.5: freeze before playback - Hanspeter Kyburz, 04 Aug 05:13PM

Vienna ensemble pro 7 torrent