For giggles, I figured I would add this commercial to my little hall of shame! What happens is impossible, as the scanner is mono-tonal, not multi-tonal. See about 10 seconds in.
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Most Barcode scanners usually have a beep on successful transmission and a beep at decode time both with different frequencies although sometimes can be disabled. Usually, you can program the scanner with a barcode selecting Low Frequency, Medium Frequency, or High Frequency for the two different tones. So maybe you can get up to 6 different tones
When working with NFC card readers for payments, the reader uses two tones, the success tone and the alert tone.
The success tone usually is a single long beep and the alert tone is usually a double short beep with lower frequency.
One typical setup, recommended by VISA, is:
Success tone: single beep with a frequency of approximately 1500 Hertz, sine wave shape, and duration of approximately 500 ms
Alert tone: a double beep with a frequency of approximately 750 Hertz, sine wave shape. Each beep shall have a duration of approximately 200 ms with a gap between the two ‘beeps’ of approximately 200 ms