noise problem

http://www.zen22142.zen.co.uk/ Circuits/Audio/6ipmix.htm
i tried to make this mixer circuit but im getting a quite bad noise problem. its a hissing, white noise like problem and very noticable. im using the tl074 opamp which is supposed to be low noise but didnt work any better than the 741. how can i cut down the noise? i think its coming from the mic amplifier section. is the schematic correct or are there important components missing?

The link was broken so I fixed it for you

http://www.zen22142.zen.co.uk/Circuits/Audio/6ipmix.htm

cheers, but does anyone have any suggestions?

cheers
what does a shitty 80s tv show have to do with this thread?

Firstly, this is /prog/.

I don't think there are any components missing. It seems to be a simple summing amplifier circuit, with inverting amplifiers for the mics. Did you use the same values for the resistors, capacitors etc?

>>4
Cheers is a very common way of saying thank you in many places, Scotland being the prime example.

>>5 yeah i used all the same component values and only made it with one mic input and output as a prototype, and with just one input the noise is way too audiable. /b/ recommended i try asking here as /g/ failed to respond at all

>>7
Try testing the circuit with a potential divider type input that is set to give a really low input voltage i.e. 10mV and record the output voltage with a voltmeter. If the gain is not what is expected (the website claims about 100 although this would vary depending on the value of the potentiometer) then you might have made a mistake in construction. Otherwise, it is probably your microphone and you will need to do some noise reduction at the input.

Components of certain apps   games and such   then theres C   JAVA PHP ect   imo C is   best half the   traps and headaches   so you can   do in C   and you can   learn about doing   realtime graphics Perl   or Ruby start   smaller though Try   writing a text   based adventure then   you can learn   about doing realtime   graphics Perl or   Ruby start smaller   though Try writing   a text based   adventure then you   can learn about   doing realtime graphics   Perl or Ruby   start smaller though   Try writing a   text based adventure   then you can.

Not happening so there must be some  internet client or  something that has  an interface but  also does something  Say what aspects  of programming interest.

<-- check em dubz

His continuum hypothesis is the proposition that ???? is the same as ℵ₁. This hypothesis has been found to be independent of the standard axioms of mathematical set theory; it can neither be proved nor disproved from the standard assumptions.

The continuum hypothesis (CH) states that there are no cardinals strictly between ℵ₀ and 2^ℵ₀. The latter cardinal number is also often denoted by ????; it is the cardinality of the continuum (the set of real numbers). In this case 2^ℵ₀ = ℵ₁. The generalized continuum hypothesis (GCH) states that for every infinite set X, there are no cardinals strictly between | X | and 2^{| X |}. The continuum hypothesis is independent of the usual axioms of set theory, the Zermelo-Fraenkel axioms together with the axiom of choice (ZFC).

Physicists however require that the end result be physically meaningful. In quantum field theory infinities arise which need to be interpreted in such a way as to lead to a physically meaningful result, a process called renormalization.

General set theory, a small fragment of Zermelo set theory sufficient for the Peano axioms and finite sets;

ZF set theory does not formalize the notion of classes. They can instead be described in the metalanguage, as equivalence classes of logical formulas. For example, if \mathcal A is a structure interpreting ZF, then the metalanguage expression \{x\mid x=x \} is interpreted in \mathcal A by the collection of all the elements from the domain of \mathcal A; that is, all the sets in \mathcal A. So we can identify the "class of all sets" with the predicate x=x or any equivalent predicate.

Similarly, although a subset of the real numbers that is not Lebesgue measurable can be proven to exist using the axiom of choice, it is consistent that no such set is definable.

Every continuous functor on a small-complete category which satisfies the appropriate solution set condition has a left-adjoint (the Freyd adjoint functor theorem).