I humbly suggest an 8 segment tower... assuming 8 bit audio, calc the avg level of 'a bunch' of samples (a frames worth? 30ms at 8 samps per ms is 240 samps for example), Set a bar in the level indicator for each bit that is set... 6 db per bit.... 1 or 2 or 3 db per segment would be more sensitive, but this tells you when you clip (top segment lit) or when you have 6 or 12 db headroom (top 1 or 2 segs unlit).
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