Edirol UA-20 Noise is heard during audio playback, Is a mic or guitar still connected?

Troubleshooting

Noise is heard during audio playback

•Is a mic or guitar still connected?

If a mic or guitar is connected to the UA-20, disconnect the mic or guitar, and turn the input sensitivity knob all the way to the left.

Disconnect any audio devices you are not using.

•Noise is sometimes heard in the line input or mic input.

If a USB-compatible MIDI sound module and the UA-20 are connected via USB to the same computer, and the outputs of the MIDI sound module are connected to the line input jacks of the UA-20, noise from your computer may be heard via the MIDI sound module from the UA-20, depending on the computer you are using. If this occurs, you can either connect the MIDI sound module and the UA-20 in parallel using a self- powered hub, or connect the MIDI sound module via its serial or MIDI interface.

•Are two or more audio devices such as the UA-20 or a mixer connected to your computer?

Try connecting only a single UA-20 unit, and check whether the noise disappears. If numerous audio devices are connected to a computer, noise may occur depending on your system. In such cases, connect only the UA-20 to your computer.

•Does your sequencer software support ASIO 2.0?

If your ASIO-compatible software does not support ASIO 2.0, it will not operate correctly if you use [UA-20 ASIO2.0 16bit] or [UA-20 ASIO2.0 24bit] as the ASIO driver.

In this case, select either [UA-20 ASIO1.0 16bit] or [UA-20 ASIO1.0 24bit] as the ASIO driver.

•Does your sequencer software support 24-bit audio?

If your ASIO-compatible software does not support 24-bit audio input/output, it will not operate correctly if you select [UA-20 ASIO1.0 24bit] or [UA-20 ASIO2.0 24bit] as the ASIO driver. In this case, select either [UA-20 ASIO1.0 16bit] or [UA-20 ASIO2.0 16bit] as the ASIO driver.

•Is the UA-20 connected to a USB hub?

Try connecting the UA-20 directly to the USB connector of the Macintosh itself.

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