LTD8308K-ETC-1TB, Platinum Professional Level 8 Channel HD-TVI DVR, 1U, SATA up to 6TB, 1TB Pre-Installed Storage. However, the digital recorder is just a backup to the main analog multi-track recorder, and the analog recording is deemed superior and thus used for the LP release. The backup digital tape was presented at the October 1976 AES Convention in New York, but never commercially released.. Note. Opening the Analog Input Recorder deletes all your existing data acquisition sessions in MATLAB. The session created by the Analog Input Recorder is not accessible from the MATLAB command line.