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HD I/O thunderbolt (digital distortion playback)
early 2011
macbook pro 2.2 GHZ Intel Core i7 4GB RAM OS 10.8.5 Protools 10.3.8 hd driver 11.1 HD native thunderbolt FPGA firmware 2.01 HD I/O firmware 5.5 Kingston SSD internal Lacie external HD (firewire 800) Issue: Had the system configured with a Hitachi internal. OS 10.9.1, PT 11.2 Gradual decay of signal until completely garbled. Almost like 2 bit playback of everything in or out. Device is seen in Avid core audio, as well as playback engine. Step Taken: 1. Replaced internal with known good SSD 2. Played back project (external) on another users MBP 3. Uninstalled HD Driver 4. Reinstalled HD Driver 5. Digitech updated firmware and passed tests. Device shows up in playback engine. Audible pop when opening project. 6. Replaced thunderbolt cable. 7. Replaced Digilink cable. 8. Tried every possible starup sequence i could think of 9. Wiped internal drive 10. Installed clean OS 10.8.5 11. Installed Pro Tools 10.3.8 12. Tried a different external firewire drive Results: No improvement. At some stages the device would appear to work normally only to gradually decay again into a munged basket of nasty. It appears that there might be a clocking related error. Or perhaps a degraded chipset in the thunderbolt box or the I/O. Conclusion : I need a new HD I/O |
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