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Pre-delay, Reverb & Delay Time Calculator


Reverb Settings

Hall (2 Bars)
reverb size

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)
reverb size

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)
reverb size

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)
reverb size

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 ValueNotesDottedTriplets
1/1 (1 Bar)500.00 ms / 2.00 Hz750.00 ms / 1.33 Hz333.33 ms / 3.00 Hz
1/2 (2 Beats)250.00 ms / 4.00 Hz375.00 ms / 2.67 Hz166.67 ms / 6.00 Hz
1/4 (1 Beat)125.00 ms / 8.00 Hz187.50 ms / 5.33 Hz83.33 ms / 12.00 Hz
1/862.50 ms / 16.00 Hz93.75 ms / 10.67 Hz41.67 ms / 24.00 Hz
1/1631.25 ms / 32.00 Hz46.88 ms / 21.33 Hz20.83 ms / 48.00 Hz
1/3215.63 ms / 64.00 Hz23.44 ms / 42.67 Hz10.42 ms / 96.00 Hz
1/647.81 ms / 128.00 Hz11.72 ms / 85.33 Hz5.21 ms / 192.00 Hz
1/1283.91 ms / 256.00 Hz5.86 ms / 170.67 Hz2.60 ms / 384.00 Hz
1/2561.95 ms / 512.00 Hz2.93 ms / 341.33 Hz1.30 ms / 768.00 Hz
1/5120.98 ms / 1024.00 Hz1.46 ms / 682.67 Hz0.65 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