I am building an audio processor with effects in my final year project using Spartan 6 and there is a problem i am facing. Since my project guide has left my institute , I am facing a few difficulties of which this is one of them. The following is the code for audio playback . When i use it without the clock divider (On board clock of 4 MHz) process i am able to hear the audio . When i change the ADC Clock (Clock Divider from 4 MHz to 44.1 KHz ) i am unable to hear anything . Why is it so. The test bench shows that the ADC clock is divided to 44.1 KHz but its not giving an on board output.