hi
having a spot of bother with the quality of the sound coming from my embedded system. Basically i am using my laptop audio line-out to feed the input of an adc. The adc output is fed into a dac input. both adc and dac are ran from same sampling clock.
i am running both pretty fast >1mhz and the quality is still poor. If i connect my speaker directly to the line out of my laptop the quality is perfect so its not my little speaker that cant handle it.
low sounds such as bass etc sound ok ish its mainly voices that sound crap.
Although its hard to tell what sounds good, its all pretty poor.
Now i am stuck as to what can be causing this poor quality. I dont think its noise or interference, i have the sampling way more than is needed. what else can it be.
The adc and dac are 3.3V devices and they use this as a reference. The lineout of my laptop i am lead to believe is 1v pk to pk so i dont think its a prob with the input range but maybe?
Just out of interest i stuck a scope on my lineout and i measured 500mV peak to peak. Is this enough to corrupt the quality? although interesting when i change the volume the poor quality does not alter so i dont think it can be clipping. I am really lost as to what it can be.
if anyone has any ideas or possible causes of this loss of quality that would be fantastic.
having a spot of bother with the quality of the sound coming from my embedded system. Basically i am using my laptop audio line-out to feed the input of an adc. The adc output is fed into a dac input. both adc and dac are ran from same sampling clock.
i am running both pretty fast >1mhz and the quality is still poor. If i connect my speaker directly to the line out of my laptop the quality is perfect so its not my little speaker that cant handle it.
low sounds such as bass etc sound ok ish its mainly voices that sound crap.
Although its hard to tell what sounds good, its all pretty poor.
Now i am stuck as to what can be causing this poor quality. I dont think its noise or interference, i have the sampling way more than is needed. what else can it be.
The adc and dac are 3.3V devices and they use this as a reference. The lineout of my laptop i am lead to believe is 1v pk to pk so i dont think its a prob with the input range but maybe?
Just out of interest i stuck a scope on my lineout and i measured 500mV peak to peak. Is this enough to corrupt the quality? although interesting when i change the volume the poor quality does not alter so i dont think it can be clipping. I am really lost as to what it can be.
if anyone has any ideas or possible causes of this loss of quality that would be fantastic.
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