M-Audio Delta 44 Appendix a Technical Specs, Analog Audio, Adapter Resource Requirements

Possible Cause 3: Some accelerated graphics cards use excessive amounts of system bandwidth, preventing the recording buffer of an audio card from keeping up with demand. This can cause clicks in the recording. Reducing or turning off the graphics card’s graphics acceleration feature often resolves this problem. In Windows, the level of graphics acceleration is accessed from Start Settings Control Panel System Performance Graphics.

Problem: The sound from the monitor mixer is muffled. It sounds as if it were running through a mixer with the treble control turned all the way down! Possible Cause: The current Delta 44 sample rate is too low. The monitor mixer is a digital device that runs at the current sample rate of the Delta 44 board. The frequency response of the mixer is roughly one-half of the sample rate. There is no way to prevent this lost frequency response while playing back or recording at a low sample rate. However, it may be prevented when the system is idle. See the “CODEC SAMPLE RATE” paragraph of the section ‘Hardware Settings Page’ for more information.

Appendix A - Technical Specs

Analog Audio
Peak Analog Input Signal:	+14dBu (+4dBu setting),
	+6dBV (Consumer setting),
	0dBV (-10dBV setting).
Peak Analog Output Signal:	+14dBu (+4dBu setting),
	+6dBV (Consumer setting).
	0dBV (-10dBV setting)
Measured Dynamic Range:
Outputs:	103dB (a-weighted),
Inputs:	99dB (a-weighted)
Measured THD (at 0dBFS):
Outputs:	less than 0.0015%,
Inputs:	less than 0.0024%
Measured Frequency Response:	22Hz - 22kHz, -0.3,-0.2dB
Input Impedance:	10k ohms minimum
Input Connectors:	1/4” female TRS-type, balanced or unbalanced
Output Connectors:	1/4” female TRS-type, balanced or unbalanced
Adapter Resource Requirements
IRQ:	One required
I/O Addresses:	Four blocks: 32, 16, 16, and 64 bytes
DMA Channels:	None required

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