Patent ID: 7593781
Filing Date: 2009-09-22
Classification: G06F

Abstract:
1. A computer-implemented method for testing a computer sound card having a wave table synthesizer and a memory storing a sample of a pre-produced digital tone at a known frequency, the method comprising executing a diagnostic application program on a computer containing the computer sound card, the diagnostic application program, when executed by the computer, configured to: utilize the wave table synthesizer of the computer sound card to play the pre-produced digital tone from the sample stored in the memory of the computer sound card; convert the pre-produced digital tone to an analog format tone; pass the analog format tone to a mixer of the computer sound card; after the analog format tone is received at the mixer, loop the analog format tone through an internal loopback mechanism of the computer sound card to a recording audio channel of the computer sound card; convert the analog format tone to a second digital format tone; record the second digital format tone; convert the recorded second digital format tone from a time domain to a frequency domain; compare the second digital format tone to the pre-produced digital tone; if the second digital format tone is substantially similar to the pre-produced digital tone, designate the audio sound card as passing an audio test;