Based on your description of the audio sample, if the beat slowly raises in noise, it's difficult to definitively identify the scale without hearing it. However, if the sound has a darker, more introspective feel, it might lean toward C minor. If it feels more uplifting, then it could be C major.
To help narrow it down:
- C minor typically has a more somber or serious tone.
- C major is generally bright and happy.
- C chromatic scale consists of all twelve pitches and has no specific tonal center.
- C pentatonic scale is often more melodic and is commonly used in folk and popular music.
Please provide more context or characteristics of the sound for a more accurate determination of the scale.