A free parallel dynamic equalizer combining parametric EQ with full dynamics processing.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
Checked September 2026
TDR Nova is best for frequency-selective compression and dynamic EQ; SPAN is best for visual frequency and loudness analysis while mixing or mastering. TDR Nova starts at Free and SPAN at Free.

A free parallel dynamic equalizer combining parametric EQ with full dynamics processing.

Free real-time FFT spectrum analyzer for professional mixing and mastering.
| TDR Nova | SPAN | |
|---|---|---|
| Best for | frequency-selective compression and dynamic EQ | visual frequency and loudness analysis while mixing or mastering |
| Starting price | Free | Free |
| Free version | Yes | Yes |
| Free trial | — | — |
| Formats | VST3, AU, AAX | VST3, AU, AAX |
| OS | Windows, macOS | Windows, macOS |
| Key features | 4 dynamic EQ bands plus high-pass/low-pass filters, Frequency-selective and multiband compression/expansion, Built-in spectrum analyzer, Equal loudness monitoring, Paid TDR Nova GE (Gentleman's Edition) adds extra features for 60 EUR | FFT spectrum analysis with adjustable block size and overlap, Multi-channel analysis (stereo, mono, mid-side, 5.1/7.1), Stereo correlation metering, EBU R128 and K-system loudness metering, True peak detection and clipping indicator |
| Developer | Tokyo Dawn Records | Voxengo |