SigmaStudio algorithm: can any latency introduced?
Thread Summary
The user asked about potential audio latency introduced by a 15-band parametric EQ. The final answer noted that the largest latency in a DSP system typically comes from A-D and D-A converters, such as the ADAU1701, which has about 1mS latency at 48KHz. Biquad EQ filters themselves do not introduce latency, as the output begins at the first sample. An accompanying answer suggested using the ADAU1772 for even lower latency (38us) and specialized IIR filtering, though it is less flexible than other SigmaDSP models.AI Generated Content
Hello all,
I wonder if the sophisticated audio algorithm can introduce any significant audio latency?
For example, if I implement a 15-band parameter EQ, can this cause any audio latency on output?
How can I know how long the latency will be in advance.
Thanks.
Hi,
Generally the largest latency in a DSP system is the A-D and D-A converters. For example, a ADAU1701's analog in-out latency is typically about 1mS at 48KHz. This results from the digital anti-aliasing filters built into these ports. The delays are specified in samples, thus the latency at 96KHz is halved. The bi-quad EQ filters have no latency to the extent that incoming sound begins to output at the first sample. Their impulse response can be long, particularly for bass frequency and sharp Q settings, but this is not usually counted as latency.
Best regards,
Bob
HI
Thank you Bob for the great response.
Rudy if, all you are doing is biquad filters and you are most concerned about latency, please consider using the ADAU1772. This part has the lowest latency in the market (38us) and have a specialized engine to do IIR filtering. Even though the part is not as flexible as any SigmaDSP, and its libraries are limited, it is great for low latency filtering applications.
Regards
Miguel
Bob and Miguel,
Thanks for your contribution. Your answer is really helpful to me.
Rudy
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