At the last part of Metallica - Unforgiven II (5:46-5:49) there is a weird 'bubble-like' sound. it also sounds like some skype notification to me.

does anybody know what makes this sound? as far as I know, none of the rock instruments produces a sound like that.

(I checked many official releases of the song and they all have it)


  • 1
    Can it be the guitarist's fingers sliding on the strings? – Bebs Jul 6 '18 at 14:31
  • I don't think we are talking about the same sound. I have heard sliding many times with both slider on/off but they don't produce a weird sound like that – Emre Ünsal Jul 7 '18 at 8:49
  • yes I know, it sounds like when you change volume in a mac computer. – Bebs Jul 7 '18 at 11:38
  • @Bebs YES! exactly! – Emre Ünsal Jul 8 '18 at 16:07
  • It sounds like the combination of fingers sliding on strings through a wah wah pedal – aceshigh Aug 13 '18 at 17:40

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