[sdiy] Output Voltage?

[Seb Francis]

(also cc'ing to list in case this info is useful)

Typical input levels for audio equipment are:

'Consumer' -10dBV which is ~0.9V ptp
'Pro-audio' +4dBu which is ~3.5V ptp

'Prosumer' gear could be either of the above 2 standards, but more 
usually is +4dBu, or switchable between the 2.

In practice however (especially for mixing desks and studio type sound 
cards) most devices actually have a bit of headroom to spare above these 
levels.  For example my PC audio interface FSR is as follows:

In '-10dBV mode' the actual FSR input level is +2dBV which is ~3.6V ptp
In '+4dBu mode' the actual FSR input level is +13dBu which is ~9.8V ptp
It also has a 'Low Gain mode' where the FSR input level is +19dBu which 
is ~19.5V ptp

Seb


harry bissell wrote:
> WOAH !!! you have a hell of an input attenuator then.  I don't have
> 'pro audio' I have "semi-pro" audio  :^P
>
> H^) harry
>
> Seb Francis wrote:
>> Depends where you patch your modular into.  Most pro-audio equipment 
>> (e.g. the mixer in your studio) will be quite happy with 10V ptp.  I 
>> just plug my modular straight in with no problems - just have to keep 
>> the input gain near minimum.
>>
>> Seb
>>
>>
>> harry bissell wrote:
>>> Most amplifiers would like to see maybe 500mV p-pk at a line input...
>>> much less at a mic or guitar input
>>>
>>> In a modular... can you guarantee which module will be the 'last' in 
>>> a chain ???
>>>
>>> I have a cable with a 10:1 resistive divider built in it, so I can 
>>> patch any modular
>>> point out to an amp, without death
>>>
>>> H^) harry
>>>
>>>
>>> Benjamín Velasco wrote:
>>>> Thanks Paul. Should I use 10 vpp in my output module also ?(the 
>>>> output of my instrument to any amp, mixer, etc)
>>>>
>>>> 2006/5/20, Paul Schreiber <synth1 at airmail.net 
>>>> <mailto:synth1 at airmail.net>>:
>>>>
>>>>     10 volts peak-to-peak for audio. 0 to +5V envelopes.
>>>>          Paul S.
>>>>             ----- Original Message -----
>>>>         *From:* Benjamín Velasco <mailto:guatis at gmail.com>
>>>>         *To:* Synth DIY List <mailto:synth-diy at dropmix.xs4all.nl>
>>>>         *Sent:* Saturday, May 20, 2006 8:44 PM
>>>>         *Subject:* [sdiy] Output Voltage?
>>>>
>>>>                  Dear list, here is a simple question: What voltage 
>>>> level
>>>>         should the output of my modular have? Is there any standard?
>>>>         Thanks
>>>>                  Benjamin
>>>>        
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