In fact the only differrence that I see from a working one and a non working one are :

WORKING

root@SheBe:~# analyseplugin lp4pole_1671.so

Plugin Name: "4 Pole Low-Pass Filter with Resonance (FCRCIA)"

Plugin Label: "lp4pole_fcrcia_oa"

Plugin Unique ID: 1672

Maker: "Mike Rawes <mike_rawes[at]yahoo.co.uk>"

Copyright: "GPL"

Must Run Real-Time: No

Has activate() Function: Yes

Has deactivate() Function: No

Has run_adding() Function: No

Environment: Normal or Hard Real-Time

Ports:  "Cutoff Frequency" input, control, 2.08333e-05*srate to 0.5*srate, default 0.5*srate, logarithmic

        "Resonance" input, control, 0 to 4, default 0

        "Input" input, audio

        "Output" output, audio

NOT WORKING

root@SheBe:~# analyseplugin tap_tubewarmth.so

Plugin Name: "TAP TubeWarmth"

Plugin Label: "tap_tubewarmth"

Plugin Unique ID: 2158

Maker: "Tom Szilagyi"

Copyright: "GPL"

Must Run Real-Time: No

Has activate() Function: No

Has deactivate() Function: No

Has run_adding() Function: Yes

Environment: Normal or Hard Real-Time

Ports:  "Drive" input, control, 0.1 to 10, default 2.575

        "Tape--Tube Blend" input, control, -10 to 10, default 10

        "Input" input, audio

        "Output" output, audio

NOT WORKING

root@SheBe:~# analyseplugin harmonic_gen_1220.so

Plugin Name: "Harmonic generator"

Plugin Label: "harmonicGen"

Plugin Unique ID: 1220

Maker: "Steve Harris <[hidden email]>"

Copyright: "GPL"

Must Run Real-Time: No

Has activate() Function: Yes

Has deactivate() Function: No

Has run_adding() Function: Yes

Environment: Normal or Hard Real-Time

Ports:  "Fundamental magnitude" input, control, -1 to 1, default 1

        "2nd harmonic magnitude" input, control, -1 to 1, default 0

        "3rd harmonic magnitude" input, control, -1 to 1, default 0

        "4th harmonic magnitude" input, control, -1 to 1, default 0

        "5th harmonic magnitude" input, control, -1 to 1, default 0

        "6th harmonic magnitude" input, control, -1 to 1, default 0

        "7th harmonic magnitude" input, control, -1 to 1, default 0

        "8th harmonic magnitude" input, control, -1 to 1, default 0

        "9th harmonic magnitude" input, control, -1 to 1, default 0

        "10th harmonic magnitude" input, control, -1 to 1, default 0

        "Input" input, audio, -1 to 1

        "Output" output, audio, -1 to 1

Maybe it can help in diagnosing why I can't tune my sond from within the controls ?

Best regards,

Jean