Re: Hiss Effect
Re: Hiss Effect
- Subject: Re: Hiss Effect
- From: Per Bull Holmen <email@hidden>
- Date: Thu, 19 May 2011 01:24:11 +0200
2011/5/18 Sean Costello <email@hidden>:
> Hey Sergio,
>>
>> In this example are you applying the RIAA curve only to hiss and scratch and not for the original music?
>
> Exactly. The music might have a separate lowpass filter applied, just to reduce the bandwidth from 20 Khz to a value around 15 KHz. Which isn't based on any concrete measurements, so much as a gut feeling that removing the very high frequencies will help create a "warmer" impression.
As mentioned, RIAA EQ on the music would be totally wrong. It boosts
the bass which was removed during printing of the vinyl, because the
vinyl can't handle the large swings in the bass signal. Vinyl
recordings typically have softer less punchy bass than CD. Little
static noise, but random pops and clicks. When the audio gets complex,
it sounds compressed and a little muddy (not so clear separation of
instruments). The high end can either go very high up and be very
clear and amazingly sweet, or be reduced in the highest range as you
suggest, depending on the quality of the playback equipment.
Per
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