Here's a quick list of tips for that:

• Run your callback on a high‑priority (or real‑time) thread so nothing interrupts it.
• Preallocate buffers and avoid heavy tasks or blocking calls right in the audio callback.
• Use a ring or double buffer to separate audio data generation from playback.
• Check for any extra work (like decoding or UI tasks) that might be causing brief delays.
• Smaller buffers mean less delay, but they also leave less room for error—find that sweet spot!

Research Links:

• Optimising Latency of Your PC Audio Interface – Sound On Sound
• How to avoid crackles and audio dropouts – Ableton

I hope this provides a good overview and helps you with your media player project.