About

This tool bridges the gap between complex Digital Audio Workstations (DAWs) and quick browser-based summing. Unlike traditional list-based mixers, this application utilizes a Psychoacoustic Visual Stage. This allows you to position audio sources in a 2D space, mimicking how the human ear perceives the stereo field - Left/Right for panning and Depth (represented by gain) for distance.

Accuracy is paramount in summing. The engine runs on 32-bit floating-point architecture, ensuring infinite headroom internally until the final output stage. We employ a Constant Power Panning Law (Sine/Cosine rule) to prevent the center-channel drop effect, ensuring that a sound panned hard left carries the same acoustic energy as one in the center.

Smart-Mix Technology: The system analyzes filenames upon upload. If it detects keywords like "Kick", "Snare", or "Vox", it automatically applies industry-standard EQ curves and panning positions derived from a database of over 100 professional mixing templates. This reduces the "time-to-static-mix" from minutes to seconds.

Formulas

When summing uncorrelated signals, the total amplitude is calculated using the root of the sum of the squares. If you have n tracks with amplitude A:

A_total = √n∑i=1 A_i²

We use a Peaking EQ filter (Biquad) for the 3-band equalizer. The transfer function H(s) in the s-domain for a peaking filter depends on gain A and quality factor Q:

H(s) = s² + s(VQ) + 1s² + s(1V⋅Q) + 1

where V is related to the boost/cut gain in dB by V = 10^|G_dB|/20.

Reference Data

Source Class	Fund. Freq (f₀)	Low Cut (HPF)	Mud Zone (Cut)	Presence (Boost)	Spatial Rec.
Sub Bass (808)	30 - 60 Hz	20 Hz	200 Hz	N/A	Center (0%)
Kick Drum (Acoustic)	50 - 80 Hz	30 Hz	250 - 400 Hz	3 - 5 kHz	Center (0%)
Snare Body	150 - 250 Hz	80 Hz	400 Hz	1.5 - 2.5 kHz	2% L/R
Snare Wires (Bottom)	Noise	150 Hz	800 Hz	5 - 8 kHz	Center (0%)
Hi-Hats (Trap)	300 - 600 Hz	350 Hz	1 kHz	10 - 15 kHz	25 - 45% Side
Claps / Perc	400 Hz	200 Hz	1.2 kHz	2 - 4 kHz	15% Side
Bass Guitar	60 - 120 Hz	40 Hz	180 Hz	700 - 900 Hz	Center (0%)
Male Vocals	100 - 150 Hz	80 Hz	300 - 450 Hz	3 - 5 kHz	Center (0%)
Female Vocals	200 - 300 Hz	120 Hz	500 Hz	5 - 8 kHz	Center (0%)
Backing Vocals	Variable	150 Hz	400 Hz	10 kHz (Air)	100% L/R
Guitars (Distorted)	150 Hz	100 Hz	350 Hz	2.5 kHz	40% L / 40% R
Acoustic Guitar	80 Hz	120 Hz	250 Hz	5 - 7 kHz	20% Side
Piano (Stereo)	27 Hz (A0)	80 Hz	300 Hz	6 kHz	100% Width
Synth Pads	Variable	200 Hz	500 Hz	8 kHz	100% Width
Strings (Section)	Variable	100 Hz	350 Hz	7 - 10 kHz	60% Side

Frequently Asked Questions

Yes. The mixer captures the summed output of the master bus in real-time. Simply click the "Rec / Export" button, play your track through, and hit Stop to download the .webm or .wav file (browser dependent).

The application parses the file name of your uploaded tracks. If you upload a file named "Kick_01.wav", it queries its internal database for "Kick" settings and automatically applies a Low-Pass filter, EQ bumps at 60Hz, and centers the pan. You can override this manually at any time.

The Stage view is a X-Y pad for mixing. Moving a dot Left/Right changes the Stereo Pan. Moving it Up/Down does NOT change volume in this version to avoid accidental level jumps, but serves as a visualizer for frequency content (planned update).

Crackling usually occurs when the Master Output exceeds 0dB (Clipping). Check the Master VU meter. If it hits red, lower the Master Fader or the individual track faders. Digital distortion is harsh and cannot be removed after export.

Yes. We strictly adhere to WCAG 2.1 standards. All faders are standard HTML range inputs with ARIA labels, allowing full keyboard control (Arrows to adjust levels, Tab to navigate tracks).