bob[_5_]
September 22nd 09, 12:14 AM
here's his email. if anyone understands, woohoo! but if not, no
worries!!
So I am trying to determine whether or not the AI-3 adat converters I
have are 24 bit or 20 bit. I have two of these so I asked Alesis and
they said that all 24 bit units would have 24 bit screened above the
IEC power........ however........ I have one which came with the box.
On the box it says 24 bit, inside the box is a "late breaking" note
which says the unit is 24 bit despite what the prinitng on the unit
says, and on the back of the unit is screened 20 bit by the IEC
(serial number matches what is printed on the outside of the box). My
other unit does not say either way. I have looked at files recorded
with the unmarked unit and they claim to be 24 bit. To add further
confusion when I inquired at Black Lion they told me
"Both the 20 bit and the 24 bit units that have come in here use the
exact same converter chips. The differences between the two with
regard to bit rate would lie solely in how the two bit depth pins on
each converter chips are configured. If the pins are configured one
way the output of the converter would be 20 bit, if they are
configured a different way the output would be 24 bit. This would be
fairly easy to alter just by changing which of the two pins are tied
to voltage and which are tied to ground. Given Alesis' track record on
the issue, I'd bet that many of the 20 bit units are actually 24 bit."
When I asked them if they could do this modification they said no I
should find a local tech...... however........ how would I know to
begin with if the unit is ACTUALLY 24 bit or 20 bit and how are the
techs going know what to mod? Arghh. I get the feeling that the
current Alesis folk know not what they speak of but I'd love to be
able to see if you could determine this information by the serial or
through a recording test. Anyone out there an expert on these?
worries!!
So I am trying to determine whether or not the AI-3 adat converters I
have are 24 bit or 20 bit. I have two of these so I asked Alesis and
they said that all 24 bit units would have 24 bit screened above the
IEC power........ however........ I have one which came with the box.
On the box it says 24 bit, inside the box is a "late breaking" note
which says the unit is 24 bit despite what the prinitng on the unit
says, and on the back of the unit is screened 20 bit by the IEC
(serial number matches what is printed on the outside of the box). My
other unit does not say either way. I have looked at files recorded
with the unmarked unit and they claim to be 24 bit. To add further
confusion when I inquired at Black Lion they told me
"Both the 20 bit and the 24 bit units that have come in here use the
exact same converter chips. The differences between the two with
regard to bit rate would lie solely in how the two bit depth pins on
each converter chips are configured. If the pins are configured one
way the output of the converter would be 20 bit, if they are
configured a different way the output would be 24 bit. This would be
fairly easy to alter just by changing which of the two pins are tied
to voltage and which are tied to ground. Given Alesis' track record on
the issue, I'd bet that many of the 20 bit units are actually 24 bit."
When I asked them if they could do this modification they said no I
should find a local tech...... however........ how would I know to
begin with if the unit is ACTUALLY 24 bit or 20 bit and how are the
techs going know what to mod? Arghh. I get the feeling that the
current Alesis folk know not what they speak of but I'd love to be
able to see if you could determine this information by the serial or
through a recording test. Anyone out there an expert on these?