Pre-delay, Reverb & Delay Time Calculator
Reverb Settings
Hall (2 Bars)

Base Duration: 1000.00 ms
Pre-Delay (1/32 note): 31.25 ms
Decay Time: 968.75 ms
Total Reverb Time: 1000.00 ms
Large Room (1 Bar)

Base Duration: 500.00 ms
Pre-Delay (1/32 note): 15.63 ms
Decay Time: 484.38 ms
Total Reverb Time: 500.00 ms
Small Room (1/2 Note)

Base Duration: 250.00 ms
Pre-Delay (1/32 note): 7.81 ms
Decay Time: 242.19 ms
Total Reverb Time: 250.00 ms
Tight Ambience (1/4 Note)

Base Duration: 125.00 ms
Pre-Delay (1/32 note): 3.91 ms
Decay Time: 121.09 ms
Total Reverb Time: 125.00 ms
Delay Note Values
Note Value | Notes | Dotted | Triplets |
---|---|---|---|
1/1 (1 Bar) | 500.00 ms / 2.00 Hz | 750.00 ms / 1.33 Hz | 333.33 ms / 3.00 Hz |
1/2 (2 Beats) | 250.00 ms / 4.00 Hz | 375.00 ms / 2.67 Hz | 166.67 ms / 6.00 Hz |
1/4 (1 Beat) | 125.00 ms / 8.00 Hz | 187.50 ms / 5.33 Hz | 83.33 ms / 12.00 Hz |
1/8 | 62.50 ms / 16.00 Hz | 93.75 ms / 10.67 Hz | 41.67 ms / 24.00 Hz |
1/16 | 31.25 ms / 32.00 Hz | 46.88 ms / 21.33 Hz | 20.83 ms / 48.00 Hz |
1/32 | 15.63 ms / 64.00 Hz | 23.44 ms / 42.67 Hz | 10.42 ms / 96.00 Hz |
1/64 | 7.81 ms / 128.00 Hz | 11.72 ms / 85.33 Hz | 5.21 ms / 192.00 Hz |
1/128 | 3.91 ms / 256.00 Hz | 5.86 ms / 170.67 Hz | 2.60 ms / 384.00 Hz |
1/256 | 1.95 ms / 512.00 Hz | 2.93 ms / 341.33 Hz | 1.30 ms / 768.00 Hz |
1/512 | 0.98 ms / 1024.00 Hz | 1.46 ms / 682.67 Hz | 0.65 ms / 1536.00 Hz |
✅ Why This Works for Your Music Production
🎧 1. Accurate Reverb Tail Timing
By setting the decay/reverb time in milliseconds based on musical tempo (BPM), you ensure your reverb tail doesn't clash with the next note.
This creates clarity and groove lock, even without room treatment.
🧠 2. Scientific & Musical Pre-Delay
The pre-delay = 1/32 note lets the dry signal be heard clearly before reverb kicks in.
This prevents muddiness in vocals or leads, which is crucial in untreated rooms.
🎚️ 3. Delay Sync (ms + Hz)
Matching delays in milliseconds to BPM makes reverb + delay feel glued to the track.
The Hz values are especially useful for plugins like FabFilter, Valhalla, RC-20, SoundToys, etc.
🎛️ 4. You Can Copy-Paste Values
Most DAW plugins accept delay/decay times in milliseconds or sync fractions (e.g., 1/8 dotted).
You can just copy the values from this tool.
🧪 Example (DAW Settings at 120 BPM)
If you pick:
Hall (2 Bars) → ~1000 ms decay
Pre-delay → ~31 ms
Use these in Valhalla Room or Pro-R:
• Set pre-delay to 31 ms
• Set decay time (RT60) to 1000 ms
Result: Tight, musical reverb, no messy low end.
⚠️ Untreated Room Tips
• Use headphones for critical decisions
• Roll off low frequencies in the reverb (HPF at 200–300 Hz)
• Keep decay <1s for small rooms unless intentional