[quote=”demetrisag”]I basically want to connect my guitar on my computer’s soundcard… [/quote]
At risk of seeming to be a dreadful bore I have used the Behringer PB100 for computer recording and found it to be most useful and versatile. It will match many microphone and musical instrument low level signals, including piezo guitar pick up, to the line input on a personal computer system unit. You can read my review at URL:
http://www.houlston.freeserve.co.uk/more-options.htm
Best wishes,
Bob #==(o )
p.s. My previous post may be useful:
Computer Recording
This is a basic method and explanation. Ensure all audio settings are set low to avoid overload of delicate equipment and speakers. Using a Windows 98 enabled Personal Computer or PC I recorded my guitar as a WAV file and then converted it into a MP3 file for upload to the internet using free http://www.musicmatch.com software. Most guitars whether electric or electro-acoustic use a standard ? inch or 6?8 mm jack plug which requires connection to shielded audio cable. At the other end you will probably require a 3?5 mm stereo plug wired for a mono connection which will be inserted into the line or microphone socket on the rear panel of the PC unit. With the speakers on you should be able to hear your guitar amplified through the PC. If not, ensure that relevant audio pathways are not muted by clicking once on the speaker symbol on the task bar to reveal volume setting and click twice to reveal line in channel settings. Go: START > ALL PROGRAMS > ACCESSORIES > ENTERTAINMENT > SOUND RECORDER to record the WAV file and then use the free MusicMatch download to convert to MP3 and reduce file size as required. I use the 16 kbps setting when converting to minimise file size and ensure a fast loading for the listener although this does reduce sound quality. It may be possible to buy the lead ready made or use an adaptor with a regular guitar lead. A Cathode Ray Tube or CRT monitor may cause audio interference via the pickup of an electric guitar. Experiment with playing position to reduce hum. You may hear my work via http://clix.to/tips ________ [URL=http://newjersey.dispensaries.org/]NEW JERSEY DISPENSARIES[/URL]

I know what you mean. The removal of a tiny bit of nth order harmonics can have that effect of making a recording ‘fake’.

BTW, we’re all students here; still learning. I’m definitely closer to kindergarten than expert 🙂 . Look forward to hearing more.

Jim,

I haven’t yet had a listen because I need to download a “.rar” decompressor. I’m sorry, I’m in the middle of something at the moment and I’ve been tied up. Have you had a look at Bob Houlston’s “Computer recording” thread here? It’s https://www.guitarsite.com/hotlicks/viewtopic.php?p=6064#6064

and may be a useful read, perhaps to contribute a post to. If the line in rolls off at 16kHz, does this really have an effect? Even for acoustic piezo, I would’ve thought that there’s not much contribution above this frequency. I promise to check your files and have a listen, but if the line-in sounds better to you, go with the ears rather than the oscilloscope.

I would try the line input first. The impedance is about right for your acoustic’s piezo output. If it’s a little too flat, you may find the jack-xlr cable worthwhile getting to plug into the mic input. I’m not surprised the instrument Hi-Z sounds a bit poor. It would work fine with a normal electric guitar but it will remove a lot of the treble on a low-impedance instrument like yours. As I said, you will not do any harm to guitar, soundcard or computer so try things out and see what you like.

Keep us posted on how you’re getting on 🙂

Demetri, don’t worry too much about impedance matching, as it doesn’t really apply too much to your situation.

The critical thing about impedance is that the output from an amplifier should be reasonably matched to the load from the speaker or speaker cabinet. If this is got badly wrong, some major damage can happen to the amp.

In your case, you’re talking about the impedance of the guitar output into the amp. Normal guitar or bass pickups send a pretty high impedance (several thousand ohms) signal to an amplifier. Piezo (acoustic) pups, “active” circuits and outboard preamps tend to send a low (tens of ohms) impedance signal. Neither will hurt the amp, but the amp’s circuit may not be best designed to cope with this for the best tone.

If your amp has a “Hi Z” and “Lo Z” choice of inputs, then plug the acoustic into the “Lo Z” input for best results. If you don’t have such an input, then tweak the eq, but you won’t, definitely won’t, burn the amp.