The right microphone and audio settings dramatically improve StreamTranslate caption accuracy. This guide covers mic selection, placement, OBS settings, and noise management.
Start Free TrialCaption accuracy is fundamentally limited by audio quality. our industry-leading speech AI is one of the most capable speech recognition models available, but it works from the audio signal your microphone delivers. A poor audio signal — background noise, distortion, room reverb — will reduce accuracy regardless of how good the underlying model is. Investing a small amount of time in your audio setup pays large dividends in caption quality.
The key factors are microphone type and position, noise isolation, and OBS audio processing settings. Each has a meaningful impact on how cleanly your speech is delivered to StreamTranslate's recognition engine.
Dedicated USB or XLR microphones with cardioid patterns isolate your voice and dramatically outperform built-in options.
6-12 inches from mouth, slightly below or to the side to avoid plosive sounds. Consistent distance = consistent accuracy.
OBS RNNoise or NVIDIA RTX Voice remove keyboard clicks, fan noise, and room ambience for cleaner speech input.
Even minimal acoustic treatment — foam panels, a reflection filter — reduces reverb that confuses speech recognition.
In OBS, set your microphone gain so your average speaking level peaks around -12dB in the audio meter. Apply a noise gate to cut background noise during silence. Enable noise suppression (RNNoise filter) for further clarity. Avoid over-compressing your audio, as heavy compression can make consonants harder for the speech model to distinguish. For detailed configuration steps, see the StreamTranslate setup guide.
A dedicated condenser or dynamic USB microphone positioned 6-12 inches from your mouth gives the best accuracy. Popular options include the Blue Yeti, HyperX QuadCast, and Shure MV7.
Yes significantly. A quality microphone with good isolation from background noise substantially improves our industry-leading speech AI's speech recognition accuracy compared to built-in laptop or webcam mics.
Yes. OBS's built-in noise suppression filter (RNNoise) or third-party tools like NVIDIA RTX Voice reduce background noise and improve caption accuracy, especially in louder environments.
Yes. Speaking too close (under 4 inches) causes distortion; too far (over 18 inches) reduces volume and clarity. 6-12 inches from your microphone is the optimal range for captioning.
Yes. Headset microphones work well for captions, especially gaming headsets with cardioid patterns like the HyperX Cloud or SteelSeries Arctis range.