Cannot work well with 16K audio sample rate

[LigangSun]

I tried to resample 16K to 48K, then do denoise, and then resample 48k to 16k,
I got very back audio quality.
Anyone has ideas about denoise 16k audio with rnnoise?

[LigangSun]

I just get through with real time audio call with the audio captured at 16k sample rate.
RNNoise works very well.
I just fill the 480 sample buffer and denoise with RNNnoise, then I get a clean audio frame.

[qiangjindong]

how to fill 480 sample buffer? thanks!

[LigangSun]

My case is in live audio call.
So I get 320 samples every 20ms, and fill the audio samples into the 480 buffer, and wait for the next 320 samples, and fill the left of the 160 samples of the 480 buffer, the denoise the buffer.
now you can get the clean audio.

[qiangjindong]

My case is in live audio call. So I get 320 samples every 20ms, and fill the audio samples into the 480 buffer, and wait for the next 320 samples, and fill the left of the 160 samples of the 480 buffer, the denoise the buffer. now you can get the clean audio.

Thank you for your reply. I'm going to use resampling. If that doesn't work, I'll use the buffering method you mentioned.