Free mixing/mastering EQ with four vintage-modeled EQ character options.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
Checked September 2026
TDR VOS SlickEQ vs SPAN (2026)
TDR VOS SlickEQ is best for musical EQ shaping with vintage analog character; SPAN is best for visual frequency and loudness analysis while mixing or mastering. TDR VOS SlickEQ starts at Free and SPAN at Free.
Free real-time FFT spectrum analyzer for professional mixing and mastering.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
| TDR VOS SlickEQ | SPAN | |
|---|---|---|
| Best for | musical EQ shaping with vintage analog character | 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 | 3 semi-parametric bands plus 18dB/oct high-pass filter, American, British, German, Soviet EQ voicing models, Five-stage output saturation, Auto gain with loudness compensation, Stereo and mid/side processing modes | 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 |
Questions people ask
TDR VOS SlickEQ starts at Free; SPAN starts at Free.
3 semi-parametric bands plus 18dB/oct high-pass filter, American, British, German, Soviet EQ voicing models, Five-stage output saturation, Auto gain with loudness compensation, Stereo and mid/side processing modes.
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.