It depends on room size and treatment goals — but here's a starting point.
As a rough guideline: 4–8 wall panels for a small home studio (around 10ft × 10ft), plus corner bass traps in 2–4 corners. Larger or acoustically harder rooms (hard floors, high ceilings, lots of glass) typically need more.
This is genuinely a "it depends" question — room dimensions, what the space is used for, and how reflective the existing surfaces are all change the number meaningfully. That's why every project starts with a free consultation and room assessment rather than a fixed package.