Re: [Frameworks] Sound ? from an Eikie

[Scott Dorsey]

Burns?  Do you mean it clips?

You could use a direct inject box from the music store if you have only
a speaker output, but many of the eikis do have a proper line output and
if yours does not it can be modified for one.
--scott
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Re: [Frameworks] Sound ? from an Eikie

[Colin Brant]

I would recommend an attenuation box to cool down the speaker level signal.

This is a pretty cheap one that works:
https://reverb.com/item/1133262-rolls-db25b-matchbox-direct-box-w-ground-lift-and-attenuator-switch?_aid=pla=USD=1=CPKBxcr278gCFdKGfgodVzYDuQ

Hope this is helpful,
Colin

On Sunday, November 1, 2015, Francisco Torres  wrote:

> amp pedal may help
>
>
> http://www.musiciansfriend.com/distortion-overdrive-effects-pedals/mxr-m-133-micro-amp-pedal
>
> 2015-11-01 8:52 GMT-04:00 Scott Dorsey  >:
>
>> Burns?  Do you mean it clips?
>>
>> You could use a direct inject box from the music store if you have only
>> a speaker output, but many of the eikis do have a proper line output and
>> if yours does not it can be modified for one.
>> --scott
>> ___
>> FrameWorks mailing list
>> FrameWorks@jonasmekasfilms.com
>> 
>> https://mailman-mail5.webfaction.com/listinfo/frameworks
>>
>
>
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Re: [Frameworks] Sound ? from an Eikie

[Francisco Torres]

amp pedal may help

http://www.musiciansfriend.com/distortion-overdrive-effects-pedals/mxr-m-133-micro-amp-pedal

2015-11-01 8:52 GMT-04:00 Scott Dorsey :

> Burns?  Do you mean it clips?
>
> You could use a direct inject box from the music store if you have only
> a speaker output, but many of the eikis do have a proper line output and
> if yours does not it can be modified for one.
> --scott
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> FrameWorks mailing list
> FrameWorks@jonasmekasfilms.com
> https://mailman-mail5.webfaction.com/listinfo/frameworks
>
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Re: [Frameworks] Sound ? from an Eikie

[Pip Chodorov]

When I show 16mm using an Eiki in my classroom, I use a guitar amp at 
the front of the room by the screen. There is a lot of buzzing when 
the film is not running so I unplug the cord from the projector, but 
when the knob is at 3:00 - in engaged mode and before the motor is 
running - there is no buzzing. The sound is good and loud, though not 
always perfect for that room.

Pip


At 15:33 -0800 1/11/15, Dave Tetzlaff wrote:
Connecting a 16mm projector with only a speaker jack to an audio 
system usually requires TWO things, and the Rolls box offers both:


1. An attenuator circuit to drop the output level from the speaker 
and match the impedance of the audio system input.


2. An isolation transformer to eliminate ground-loop hum.

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Re: [Frameworks] Sound ? from an Eikie

[Dave Tetzlaff]

Yes! That looks like EXACTLY what you need, and that's a good price for a 
readymade box.

Connecting a 16mm projector with only a speaker jack to an audio system usually 
requires TWO things, and the Rolls box offers both:

1. An attenuator circuit to drop the output level from the speaker and match 
the impedance of the audio system input.

2. An isolation transformer to eliminate ground-loop hum.

Some but not many projectors do have line level outputs, which don't require 
attenuation, but can still require isolation to prevent ground loop hum. You 
can usually get isolation cable with RCA jacks on each end at specialty car 
stereo stores.

I haven't used that Rolls direct box, but I like that it has a variable 
attenuation circuit. I've made some simple one-value attenuation circuits, but 
every two devices you connect are a bit different, and it's hard to find one 
perfect level that fits all.

Do note though, that the output of the Rolls box is a mono balanced line with 
an XLR connector – ideal for connection to an audio mixer, but to go directly 
into an equalizer you're probably looking at unbalanced stereo inputs (RCA 
jacks), so you'll probably need a custom cable for that. It should be a 
straight connection though — that is, you don't need another transformer to 
match the balanced out of the box to the higher-Z inputs of the equalizer.


> I would recommend an attenuation box to cool down the speaker level signal. 
> 
> This is a pretty cheap one that works: 
> https://reverb.com/item/1133262-rolls-db25b-matchbox-direct-box-w-ground-lift-and-attenuator-switch?_aid=pla=USD=1=CPKBxcr278gCFdKGfgodVzYDuQ


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