Isn USB power too noisy to supply the sensitive audio circuitry of a headphone amplifier?
The audio circuitry in the UHA-3 does not use the USB 5V supply directly. High-frequency switching regulators provide a means of isolating sensitive circuitry from noise which might be on the USB power. back to the top What is the dynamic range of the UHA-3? When using the analog line input in low-gain mode, the dynamic range is greater than 120 dB A-weighted. Because the USB 1.1 audio streaming protocol is limited to 16-bit, the dynamic range when using the USB input is limited to about 96 dB A-weighted. back to the top Which gain setting should I use? The low-gain setting can be used in most cases, resulting in a lower output noise floor. Use the high-gain setting only if you are unable to get enough output signal level in the low-gain setting. back to the top What sample rates are supported with USB streaming? Sample rates of 32kHz, 44.1kHz, and 48kHz are supported. Sample rate is automatically detected by the UHA-3. Word length is 16 bits for all sample rates. back to the top Am I
