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<blockquote data-quote="Art Welter" data-source="post: 26014" data-attributes="member: 52">Re: delay for a mic &amp; a di?Since 1979, I almost have&nbsp; always used both a DI and a microphone on bass guitars.I&nbsp; always ask the bass player to play a sustained low &quot;B&quot; or &quot;E&quot; and check for cancellation when combined, reversing polarity on one channel if required.As it turns out, the phase response of a speaker cabinet/microphone output is so different from the DI phase response, reversing polarity seldom results in a dramatic level change, it is usually results more a change in &quot;color&quot;, or tone. In fact, I found the DI box I usually use for bass is pin 3 +, so most of the time the two signals were technically reversed polarity, while in actuality there is probably only one frequency that a 180 degree reversal takes place at.Inserting a short delay would only correct phase at that one frequency.That might be useful for &quot;Johnny one note&quot;, but would not help most players sound.Latency in&nbsp; digital modeling circuitry, as Kristian mentions, could be enough that a delay on the microphone might benefit, but it would still be a subjective assessment as far as the delay time decision.Considering digital latency of a digital modeling circuitry is usually under 2 ms, I won&#039;t be worrying about them.If it looks louder on the meter, sounds louder/better in the headphones and the mains, go for it. If it doesn&#039;t, play around with EQ, phase reverse, and also delay if you care to add even one more level of complexity to a subjective tonal decision.Art</blockquote>

[QUOTE="Art Welter, post: 26014, member: 52"] Re: delay for a mic & a di? Since 1979, I almost have always used both a DI and a microphone on bass guitars. I always ask the bass player to play a sustained low "B" or "E" and check for cancellation when combined, reversing polarity on one channel if required. As it turns out, the phase response of a speaker cabinet/microphone output is so different from the DI phase response, reversing polarity seldom results in a dramatic level change, it is usually results more a change in "color", or tone. In fact, I found the DI box I usually use for bass is pin 3 +, so most of the time the two signals were technically reversed polarity, while in actuality there is probably only one frequency that a 180 degree reversal takes place at. Inserting a short delay would only correct phase at that one frequency. That might be useful for "Johnny one note", but would not help most players sound. Latency in digital modeling circuitry, as Kristian mentions, could be enough that a delay on the microphone might benefit, but it would still be a subjective assessment as far as the delay time decision. Considering digital latency of a digital modeling circuitry is usually under 2 ms, I won't be worrying about them. If it looks louder on the meter, sounds louder/better in the headphones and the mains, go for it. If it doesn't, play around with EQ, phase reverse, and also delay if you care to add even one more level of complexity to a subjective tonal decision. Art [/QUOTE]

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