Re: [Denemo-devel] hum on the mic input

[Richard Shann]

On Fri, 2008-09-12 at 13:51 +0200, Nils Gey wrote:
> On Fri, 12 Sep 2008 12:25:27 +0100
> Richard Shann <address@hidden> wrote:
> 
> > On Fri, 2008-09-12 at 12:01 +0200, Nils Gey wrote:
> > > > Another route I would like to explore is direct midi input (the small
> > > > keyboard I have Yamaha SHS-10 has a midi out), but the only devices I
> > > > see are  midi to usb, and have windows drivers...
> > > 
> > > I'm not sure what you really mean but I got it as Midi-In for Denemo? I 
> > > think thats the same work as midi out ergo ALSA/JACK.
> > Yes, that is what I would expect, but I am at the stage before that - I
> > have no port on my computer labelled midi-in, so I can't plug this
> > Yamaha keyboard in. So I have no live midi input signal to work with.
> 
> For testing you could just use a virtual midi keyboard. There are plenty in 
> Linux avaible. 
> Denemo needs an ALSA or JACK Midi-in port (and off course Midi-out). Anything 
> else is done outside of Denemo, especially the routing and connecting.
> 
> For real hardware-midi you need a proper soundcard. Which one do you have? 
I've had a root around, and what I have is built in to the motherboard,
a Realtek ALC650 audio chip (I was thinking of the graphics card when I
referred to a soundcard, sorry).

> The "standard" PCI card is the M-Audio Delta Audiophile 2469 which is ok for 
> professional audio recording and off course Midi for a low price. 
I think I could raise the cash for that, although it seems a bit
overkill - I am not really interested in the sound quality - I never
listen to recorded music much, I just play on musical instruments, and
want to get more music scores to play. There are old printed scores from
the museums available online now, and I have started mining them for new
repertoire.
> There are a lot of other pci, usb or firewire devices avaible.
> 
> > I have looked on the internet for information on getting physical midi
> > signals into a computer running Linux but mostly what I see seems very
> > old, saying that soundcards are (were?) midi capable but just lacked a
> > little bit of circuitry to actually connect the midi out of equipment to
> > them. And I see midi-usb devices for sale, but they only mention
> > windows.
> > Richard
>  
> You seem to be a lot outdated or not experienced with audio-linux.
Not experienced, in fact.
>  Since I don't know what you do outside of Denemo I can only guess.
>  However, the status is:
> Many PCI, Firewire and USB devices work just fine with Linux (while this is 
> exactly the order of what-to-prefer when you need low latency and low cpu 
> usage). Off course the most hardware-seller don't mention linux but ALSA can 
> handle many PCI and USB devices while FFADO/Freebob is for the Firewire 
> devices. 

> There are acutally lots of websites and more discussions in mailing lists 
> what to buy
This is my weak spot, I have spent time looking but all I found were
sites discussing how to wire up the game port (?) of a soundcard to do
midi.
Can you send a link to a site that lists linux comaptible midi stuff?
Thanks for your help.
Richard