This page looks at visible frequency-range behaviour in the embedded DeltaWave report images. It is intended to sit beside the reference-closeness page, not replace listening tests or the main performance studies.
Encoding speed is deliberately left out here. Performance is covered elsewhere on the site; this lab page focuses on measured output behaviour against the demanding reference WAV.
Earlier builds show visible filtering/floor behaviour in the DeltaWave images and generally lower apparent high-frequency extent.
3.99.5 and newer modern rows extend higher in this image-derived proxy, usually around the upper part of the 44.1 kHz source bandwidth.
This is not a quality verdict. A wider visible range does not automatically mean better perceived sound.
The source is 44.1 kHz, so the Nyquist limit is 22.05 kHz. These values are approximate visual estimates from the DeltaWave report images, not exported frequency-response measurements.
How to read it: higher kHz means the image-derived proxy found activity extending higher in frequency. It does not automatically mean better audible quality.
| Compile / configuration | Approx. high-frequency extent |
|---|---|
| 3.95.1 standard VBR | 18.91 kHz |
| 3.96.1 standard VBR | 18.91 kHz |
| 3.97 standard VBR | 18.50 kHz |
| 3.98.4 standard VBR | 18.84 kHz |
| 3.99.5 standard VBR | 20.63 kHz |
| 3.100 standard VBR | 20.63 kHz |
| 3.100 cVBR | 20.56 kHz |
| 3.101b3 standard VBR | 20.61 kHz |
| 3.101b3 cVBR | 20.61 kHz |
| 3.101b3 cVBR Optimized | 20.59 kHz |
| 3.101b3 cVBR Optimized | 20.59 kHz |
| 3.101b3 cVBRb Optimized | 20.59 kHz |
| 3.101b3 cVBRb Optimized boost 1 | 20.69 kHz |
| 3.101b3 cVBRb Optimized boost 2 | 20.80 kHz |
| 3.101b3 cVBRb Optimized boost 3 | 20.91 kHz |
Visual proxy derived from the embedded DeltaWave report image. Treat this as approximate, not as a laboratory frequency-response measurement.
How to read it: visible horizontal floors or early high-frequency drop-offs are diagnostic clues, not standalone quality scores.
The frequency-range values are visual proxies extracted from the embedded DeltaWave images. The algorithm looks for the first sustained row of non-background activity in the spectrogram-style image and maps that row to a frequency using the 44.1 kHz source rate. This is useful for finding visible filtering floors, but it should not be described as a precise laboratory frequency-response measurement.
For a stronger page, the next step would be to export numeric spectral data or run a repeatable FFT-based measurement on each decoded WAV. That would allow exact cutoff, roll-off, and high-frequency energy comparisons rather than image-derived estimates.
No. The range values are an approximate visual proxy from the embedded DeltaWave report images. They are useful for spotting broad filtering and floor behaviour, but should not be treated as lab-grade response measurements.
No. A wider visible range is not automatically a quality verdict. The chart shows output behaviour against this reference sample, not listener preference or transparency.
Encoding speed is covered in the performance studies. This lab page keeps the focus on DeltaWave output behaviour and frequency-range observations.