Reliabiity of the dropout report

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  • 21st August 2015 at 09:42 #26382
    Alan
    Participant

    I have a new uTrack24 with upgraded firmware and have been experimenting with storage media. First I tried some ancient 20-30GB IDE hard disks in self powered USB 2.0 enclosures. They formatted just fine and reported ready for 24 tracks at 48kHz 24-bit. I then tried recording blank audio for the entire size of the drives, till the uT24 ran out of room and stopped.

    I then tried a SDHC and a SDXC Class 10 flash cards in a usb3 reader. Both formatted fine, but reported warnings about flash drives and set the recorder to 16 channel 16 bit 48kHz. Being curious I then forced the uT24 to 24 track 24 bit 48kHz and tried recording. The slower card then started reporting dropout on the panel. When I tried the same thing with the SDXC class 10 card no dropouts were recorded through the entire 64 GB card.

    My question is, does the fact that no dropouts were reported during a full media recording mean I can use that storage device and reliably get dropout-free recordings? And what is it that the format system didn’t like about the SDXC card even though it recorded just fine? If no dropouts are reported during a particular recording take, does that mean the recording is 100% dropout free?

    21st August 2015 at 10:09 #26383
    Chetan
    Participant

    Hi Wolftraks,

    There is some explanation about usage of SSD and thumb drives in the FAQ section “What USB Thumb Drives work well?”. The info is available at https://cymaticaudio.com/support/faq

    Regarding your last question, it has already been explained that the speeds of the same SSD vary’s depending on what is happening internally. You never know if starting from a freshly formatted SSD drive, the behavior will be exactly the same as before. That is why we do not recommend SSD drives. With improving technology in this field, it might mean that there shall be no dropouts with some of the SSD’s. But we cannot guarantee it.

    21st August 2015 at 17:12 #26384
    Alan
    Participant

    How about: If no dropouts are reported during a particular take, does that mean the recording is 100% dropout free? Or is it possible that a dropout is recorded but not detected?

    What’s the minimum sustained transfer rate required by the uT24 at 24 tracks, 48kHz 24 bit plus overhead?

    21st August 2015 at 17:52 #26385
    Chetan
    Participant

    If no dropouts are reported during a particular take, the recording shall not have any dropouts either.

    The sustained transfer rate required by uTrack24 with the configuration you mentioned would be around 4MB/sec. Do remember that this means at least 4MB EVERY single second and not an average of 4MB/sec.

    Hope this helps.

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