There are lots of choices in CTX programs (many patterns began their life as E-Trac patterns and can be used as such). You can pursue some of the common ones below and decide which ones you want to try. Many patterns are fairly similar in their attempted goal of isolating the non-ferrous good target and silencing the undesired ferrous. A test garden would be a good idea to double-check how these various choices might affect target recovery in your dirt.
In the patterns below, there are two patterns for each, a high Disc search mode, and a low Disc to hear all (the CTX can easily be set to switch back-and-forth between pattern and bin settings). The individual bin settings are listed in the first five columns (which match the displayed pattern from left to right, top to bottom), Low, L-M, M-H, High, and BTM (bottom bin). These are the bin Hz settings for the audio response the detector will make within the respective bins. Not all 5 bins are necessarily used depending on the bin divisions chosen. Thus, for example, Jason's Gold Pattern (below) has 208 Hz in the low bin (left bin), 12000 Hz in the right bin, and 75 Hz set in the fifth (bottom) bin. Realize that when using a heavily Disc'd pattern, the CTX loses sensitivity (target separation suffers) and nulls more (will provide no response) within fields of dense iron (e.g. nails co-located with non-ferrous), so you risk losing non-ferrous good targets with lots of Disc (even a little can yield a dramatic loss in sensitivity, thus the more open second pattern as a Disc2 choice).
The other columns given are settings for, RES (Signal Response) which can be set either Normal, Long, Smooth, or Pitch Hold). RF (Recovery Fast) can be set on or off (x means on). RD (Recovery Deep) is also On/Off. SEA (Seawater) is likewise set either On or Off. TAR (Target Separation) is set to either GC (Ground Coin), FC (Ferrous Coin), HT (High Trash), or LT (Low Trash). PP (PinPoint Mode) is either Nor (Normal) or SZG (Sizing). Sensitivity Mode is typically set to AUTO (not shown) and Auto Sens level to +3 to maintain detector stability. Of course, you can change any setting, these parameters are not set in stone. Enjoy!
-- Johnnyanglo