Tascam 24 Owner's Manual page 59

A computer does not recognize the unit
when connected by USB.
0 Has the dedicated software been installed? (See "Installing
the dedicated software" on page 51.)
0 This unit cannot be used with USB 1.1. Use a USB 2.0 or USB
3.0 port.
0 Do not use a USB hub with this unit. Always connect the unit
directly to a USB port on the computer.
0 If the above methods do not resolve the problem, connect
the unit to a different USB port on the computer.
When connected by USB, sound breaks up or
noise occurs.
0 The processing load on the computer causes sound to break
up and noise to occur.
0 If a wireless LAN or background software, including antivi-
rus software, is running, turn it off during use of this unit.
In addition, please use "computer's power option" as "high
performance setting".
0 Use the shortest USB cable possible.
0 Use a USB port built into the computer because the comput-
er USB port affects the USB connection.
13 – Troubleshooting
TASCAM Model 24
59