From 0e11f8ec202fb5c91b6054705a40070a1c1cec42 Mon Sep 17 00:00:00 2001 From: TerryMathews Date: Mon, 10 Jan 2022 15:32:46 -0500 Subject: [PATCH] [Keyboard] TKC California (#15124) * CALIFORNIA: Initial support for TKC California * update readme.md, info.json * Update keyboards/tkc/california/rules.mk * Update keyboards/tkc/california/rules.mk * Update keyboards/tkc/california/readme.md * Update keyboards/tkc/california/rules.mk * Update keyboards/tkc/california/info.json --- keyboards/tkc/california/california.c | 18 +++ keyboards/tkc/california/california.h | 50 +++++++ keyboards/tkc/california/config.h | 123 ++++++++++++++++++ keyboards/tkc/california/info.json | 10 ++ .../tkc/california/keymaps/default/keymap.c | 29 +++++ keyboards/tkc/california/keymaps/via/keymap.c | 38 ++++++ keyboards/tkc/california/keymaps/via/rules.mk | 2 + keyboards/tkc/california/readme.md | 21 +++ keyboards/tkc/california/rules.mk | 18 +++ 9 files changed, 309 insertions(+) create mode 100644 keyboards/tkc/california/california.c create mode 100644 keyboards/tkc/california/california.h create mode 100644 keyboards/tkc/california/config.h create mode 100644 keyboards/tkc/california/info.json create mode 100644 keyboards/tkc/california/keymaps/default/keymap.c create mode 100644 keyboards/tkc/california/keymaps/via/keymap.c create mode 100644 keyboards/tkc/california/keymaps/via/rules.mk create mode 100644 keyboards/tkc/california/readme.md create mode 100644 keyboards/tkc/california/rules.mk diff --git a/keyboards/tkc/california/california.c b/keyboards/tkc/california/california.c new file mode 100644 index 0000000000..002732208f --- /dev/null +++ b/keyboards/tkc/california/california.c @@ -0,0 +1,18 @@ +/* +Copyright 2021 Terry Mathews + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +#include "california.h" diff --git a/keyboards/tkc/california/california.h b/keyboards/tkc/california/california.h new file mode 100644 index 0000000000..a438e6a024 --- /dev/null +++ b/keyboards/tkc/california/california.h @@ -0,0 +1,50 @@ +/* +Copyright 2021 Terry Mathews + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +#pragma once + +#include "quantum.h" + +/* This a shortcut to help you visually see your layout. + * + * The first section contains all of the arguments representing the physical + * layout of the board and position of the keys. + * + * The second converts the arguments into a two-dimensional array which + * represents the switch matrix. + */ +#define LAYOUT_all( \ + K00, K02, K03, K04, K05, K06, K07, K08, K09, K61, K62, K63, K64, K65, K66, K67, K68, K69, \ + K10, k11, K12, K13, K14, K15, K16, K17, K18, K19, K70, K71, K72, K73, K74, K75, K76, K77, K78, K79, \ + K20, K22, K23, K24, K25, K26, K27, K28, K29, K80, K81, K82, K83, K84, K85, K86, K87, K88, K89, \ + K30, K32, K33, K34, K35, K36, K37, K38, K39, K90, K91, K92, K93, K96, K97, K98, K99, \ + K40, K42, K43, K44, K45, K46, K47, K48, K49, KA0, KA1, KA2, KA4, KA5, KA6, KA7, KA8, KA9, \ + K50, K51, K52, K55, K58, KB0, KB2, KB4, KB5, KB6, KB7, KB8, KB9 \ +) { \ + { K00, KC_NO, K02, K03, K04, K05, K06, K07, K08, K09 }, \ + { K10, k11, K12, K13, K14, K15, K16, K17, K18, K19 }, \ + { K20, KC_NO, K22, K23, K24, K25, K26, K27, K28, K29 }, \ + { K30, KC_NO, K32, K33, K34, K35, K36, K37, K38, K39 }, \ + { K40, KC_NO, K42, K43, K44, K45, K46, K47, K48, K49 }, \ + { K50, K51, K52, KC_NO, KC_NO, K55, KC_NO, KC_NO, K58, KC_NO }, \ + { KC_NO, K61, K62, K63, K64, K65, K66, K67, K68, K69 }, \ + { K70, K71, K72, K73, K74, K75, K76, K77, K78, K79 }, \ + { K80, K81, K82, K83, K84, K85, K86, K87, K88, K89 }, \ + { K90, K91, K92, K93, KC_NO, KC_NO, K96, K97, K98, K99 }, \ + { KA0, KA1, KA2, KC_NO, KA4, KA5, KA6, KA7, KA8, KA9 }, \ + { KB0, KC_NO, KB2, KC_NO, KB4, KB5, KB6, KB7, KB8, KB9 } \ +} diff --git a/keyboards/tkc/california/config.h b/keyboards/tkc/california/config.h new file mode 100644 index 0000000000..7820869142 --- /dev/null +++ b/keyboards/tkc/california/config.h @@ -0,0 +1,123 @@ +/* +Copyright 2021 Terry Mathews + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +#pragma once + +#include "config_common.h" + +/* USB Device descriptor parameter */ +#define VENDOR_ID 0x544B //TK +#define PRODUCT_ID 0x0009 +#define DEVICE_VER 0x0001 +#define MANUFACTURER TKC +#define PRODUCT California + +/* key matrix size */ +#define MATRIX_ROWS 12 +#define MATRIX_COLS 10 + +#define DYNAMIC_KEYMAP_LAYER_COUNT 2 //Reduced layer count due to memory space considerations + +/* + * Keyboard Matrix Assignments + * + * Change this to how you wired your keyboard + * COLS: AVR pins used for columns, left to right + * ROWS: AVR pins used for rows, top to bottom + * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode) + * ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode) + * +*/ +#define MATRIX_ROW_PINS { C7, C6, B6, D4, D3, D0, E6, B0, B1, B2, D2, B3 } +#define MATRIX_COL_PINS { B5, B4, D7, D6, F7, F6, F5, D5, D1, F4 } +#define UNUSED_PINS + +/* COL2ROW, ROW2COL*/ +#define DIODE_DIRECTION ROW2COL + +/* + * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN. + */ +//#define SOFT_SERIAL_PIN D0 // or D1, D2, D3, E6 +#define BACKLIGHT_PIN B7 +#ifdef BACKLIGHT_PIN +#define BACKLIGHT_BREATHING +#define BACKLIGHT_LEVELS 3 +#endif +#define LED_NUM_LOCK_PIN F1 +#define LED_CAPS_LOCK_PIN F0 + +/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */ +#define DEBOUNCE 5 + +/* define if matrix has ghost (lacks anti-ghosting diodes) */ +//#define MATRIX_HAS_GHOST + +/* number of backlight levels */ + +/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */ +#define LOCKING_SUPPORT_ENABLE +/* Locking resynchronize hack */ +#define LOCKING_RESYNC_ENABLE + +/* If defined, GRAVE_ESC will always act as ESC when CTRL is held. + * This is userful for the Windows task manager shortcut (ctrl+shift+esc). + */ +// #define GRAVE_ESC_CTRL_OVERRIDE + +/* + * Force NKRO + * + * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved + * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the + * makefile for this to work.) + * + * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N) + * until the next keyboard reset. + * + * NKRO may prevent your keystrokes from being detected in the BIOS, but it is + * fully operational during normal computer usage. + * + * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N) + * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by + * bootmagic, NKRO mode will always be enabled until it is toggled again during a + * power-up. + * + */ +//#define FORCE_NKRO + +/* + * Feature disable options + * These options are also useful to firmware size reduction. + */ + +/* disable debug print */ +//#define NO_DEBUG + +/* disable print */ +//#define NO_PRINT + +/* disable action features */ +//#define NO_ACTION_LAYER +//#define NO_ACTION_TAPPING +//#define NO_ACTION_ONESHOT +//#define NO_ACTION_MACRO +//#define NO_ACTION_FUNCTION + +/* Bootmagic Lite key configuration */ +// #define BOOTMAGIC_LITE_ROW 0 +// #define BOOTMAGIC_LITE_COLUMN 0 diff --git a/keyboards/tkc/california/info.json b/keyboards/tkc/california/info.json new file mode 100644 index 0000000000..ef55e0e2e0 --- /dev/null +++ b/keyboards/tkc/california/info.json @@ -0,0 +1,10 @@ +{ + "keyboard_name": "TKC California", + "url": "", + "maintainer": "TerryMathews", + "layouts": { + "LAYOUT_all": { + "layout": [{"label":"Esc", "x":0, "y":0}, {"label":"F1", "x":2, "y":0}, {"label":"F2", "x":3, "y":0}, {"label":"F3", "x":4, "y":0}, {"label":"F4", "x":5, "y":0}, {"label":"F5", "x":6.5, "y":0}, {"label":"F6", "x":7.5, "y":0}, {"label":"F7", "x":8.5, "y":0}, {"label":"F8", "x":9.5, "y":0}, {"label":"F9", "x":11, "y":0}, {"label":"F10", "x":12, "y":0}, {"label":"F11", "x":13, "y":0}, {"label":"F12", "x":14, "y":0}, {"label":"PrtSc", "x":15.5, "y":0}, {"label":"Home", "x":17, "y":0}, {"label":"End", "x":18, "y":0}, {"label":"Scroll Lock", "x":19, "y":0}, {"label":"Pause", "x":20, "y":0}, {"label":"~", "x":0, "y":1.5}, {"label":"!", "x":1, "y":1.5}, {"label":"@", "x":2, "y":1.5}, {"label":"#", "x":3, "y":1.5}, {"label":"$", "x":4, "y":1.5}, {"label":"%", "x":5, "y":1.5}, {"label":"^", "x":6, "y":1.5}, {"label":"&", "x":7, "y":1.5}, {"label":"*", "x":8, "y":1.5}, {"label":"(", "x":9, "y":1.5}, {"label":")", "x":10, "y":1.5}, {"label":"_", "x":11, "y":1.5}, {"label":"+", "x":12, "y":1.5}, {"label":"Bksp", "x":13, "y":1.5}, {"x":14, "y":1.5}, {"label":"PgUp", "x":15.5, "y":1.5}, {"label":"Num Lock", "x":17, "y":1.5}, {"label":"/", "x":18, "y":1.5}, {"label":"*", "x":19, "y":1.5}, {"label":"-", "x":20, "y":1.5}, {"label":"Tab", "x":0, "y":2.5, "w":1.5}, {"label":"Q", "x":1.5, "y":2.5}, {"label":"W", "x":2.5, "y":2.5}, {"label":"E", "x":3.5, "y":2.5}, {"label":"R", "x":4.5, "y":2.5}, {"label":"T", "x":5.5, "y":2.5}, {"label":"Y", "x":6.5, "y":2.5}, {"label":"U", "x":7.5, "y":2.5}, {"label":"I", "x":8.5, "y":2.5}, {"label":"O", "x":9.5, "y":2.5}, {"label":"P", "x":10.5, "y":2.5}, {"label":"{", "x":11.5, "y":2.5}, {"label":"}", "x":12.5, "y":2.5}, {"label":"|", "x":13.5, "y":2.5, "w":1.5}, {"label":"PgDn", "x":15.5, "y":2.5}, {"label":"7", "x":17, "y":2.5}, {"label":"8", "x":18, "y":2.5}, {"label":"9", "x":19, "y":2.5}, {"label":"+", "x":20, "y":2.5}, {"label":"Caps Lock", "x":0, "y":3.5, "w":1.75}, {"label":"A", "x":1.75, "y":3.5}, {"label":"S", "x":2.75, "y":3.5}, {"label":"D", "x":3.75, "y":3.5}, {"label":"F", "x":4.75, "y":3.5}, {"label":"G", "x":5.75, "y":3.5}, {"label":"H", "x":6.75, "y":3.5}, {"label":"J", "x":7.75, "y":3.5}, {"label":"K", "x":8.75, "y":3.5}, {"label":"L", "x":9.75, "y":3.5}, {"label":":", "x":10.75, "y":3.5}, {"label":"\"", "x":11.75, "y":3.5}, {"label":"Enter", "x":12.75, "y":3.5, "w":2.25}, {"label":"4", "x":17, "y":3.5}, {"label":"5", "x":18, "y":3.5}, {"label":"6", "x":19, "y":3.5}, {"x":20, "y":3.5}, {"label":"Shift", "x":0, "y":4.5, "w":2.25}, {"label":"Z", "x":2.25, "y":4.5}, {"label":"X", "x":3.25, "y":4.5}, {"label":"C", "x":4.25, "y":4.5}, {"label":"V", "x":5.25, "y":4.5}, {"label":"B", "x":6.25, "y":4.5}, {"label":"N", "x":7.25, "y":4.5}, {"label":"M", "x":8.25, "y":4.5}, {"label":"<", "x":9.25, "y":4.5}, {"label":">", "x":10.25, "y":4.5}, {"label":"?", "x":11.25, "y":4.5}, {"label":"Shift", "x":12.25, "y":4.5, "w":1.75}, {"x":14, "y":4.5}, {"label":"\u2191", "x":15.5, "y":4.75}, {"label":"1", "x":17, "y":4.5}, {"label":"2", "x":18, "y":4.5}, {"label":"3", "x":19, "y":4.5}, {"label":"Enter", "x":20, "y":4.5}, {"label":"Ctrl", "x":0, "y":5.5, "w":1.25}, {"label":"Win", "x":1.25, "y":5.5, "w":1.25}, {"label":"Alt", "x":2.5, "y":5.5, "w":1.25}, {"x":3.75, "y":5.5, "w":6.25}, {"label":"Alt", "x":10, "y":5.5, "w":1.25}, {"label":"Menu", "x":11.25, "y":5.5, "w":1.25}, {"label":"Ctrl", "x":12.5, "y":5.5, "w":1.25}, {"label":"\u2190", "x":14.5, "y":5.75}, {"label":"\u2193", "x":15.5, "y":5.75}, {"label":"\u2192", "x":16.5, "y":5.75}, {"label":"0", "x":18, "y":5.5}, {"label":".", "x":19, "y":5.5}, {"x":20, "y":5.5}] + } + } +} \ No newline at end of file diff --git a/keyboards/tkc/california/keymaps/default/keymap.c b/keyboards/tkc/california/keymaps/default/keymap.c new file mode 100644 index 0000000000..747ed11e00 --- /dev/null +++ b/keyboards/tkc/california/keymaps/default/keymap.c @@ -0,0 +1,29 @@ +/* +Copyright 2021 Terry Mathews + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +#include QMK_KEYBOARD_H + +const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = { + [0] = LAYOUT_all( /* Base */ + + KC_ESC,KC_F1,KC_F2,KC_F3,KC_F4,KC_F5,KC_F6,KC_F7,KC_F8,KC_F9,KC_F10,KC_F11,KC_F12,KC_PSCR,KC_HOME,KC_END,KC_SLCK,KC_PAUS, + KC_GRV,KC_1,KC_2,KC_3,KC_4,KC_5,KC_6,KC_7,KC_8,KC_9,KC_0,KC_MINS,KC_EQL,KC_DEL,KC_BSPC,KC_PGUP,KC_NLCK,KC_PSLS,KC_PAST,KC_PMNS, + KC_TAB,KC_Q,KC_W,KC_E,KC_R,KC_T,KC_Y,KC_U,KC_I,KC_O,KC_P,KC_LBRC,KC_RBRC,KC_BSLS,KC_PGDN,KC_P7,KC_P8,KC_P9,KC_PMNS, + KC_CAPS,KC_A,KC_S,KC_D,KC_F,KC_G,KC_H,KC_J,KC_K,KC_L, KC_SCLN, KC_QUOT, KC_ENT,KC_P4, KC_P5, KC_P6,KC_PPLS, + KC_LSFT,KC_Z,KC_X,KC_C,KC_V,KC_B,KC_N,KC_M,KC_COMM,KC_DOT,KC_SLSH,KC_RSFT,KC_NO,KC_UP, KC_P1, KC_P2, KC_P3, KC_PENT, + KC_LCTL, KC_LGUI, KC_LALT, KC_SPC, KC_RALT,KC_MENU, KC_RCTL, KC_LEFT, KC_DOWN, KC_RGHT, KC_P0, KC_PDOT, KC_PENT), +}; diff --git a/keyboards/tkc/california/keymaps/via/keymap.c b/keyboards/tkc/california/keymaps/via/keymap.c new file mode 100644 index 0000000000..b84fdd4a2e --- /dev/null +++ b/keyboards/tkc/california/keymaps/via/keymap.c @@ -0,0 +1,38 @@ +/* +Copyright 2021 Terry Mathews + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +#include QMK_KEYBOARD_H + +const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = { + [0] = LAYOUT_all( /* Base */ + + KC_ESC,KC_F1,KC_F2,KC_F3,KC_F4,KC_F5,KC_F6,KC_F7,KC_F8,KC_F9,KC_F10,KC_F11,KC_F12,KC_PSCR,KC_HOME,KC_END,KC_SLCK,KC_PAUS, + KC_GRV,KC_1,KC_2,KC_3,KC_4,KC_5,KC_6,KC_7,KC_8,KC_9,KC_0,KC_MINS,KC_EQL,KC_DEL,KC_BSPC,KC_PGUP,KC_NLCK,KC_PSLS,KC_PAST,KC_PMNS, + KC_TAB,KC_Q,KC_W,KC_E,KC_R,KC_T,KC_Y,KC_U,KC_I,KC_O,KC_P,KC_LBRC,KC_RBRC,KC_BSLS,KC_PGDN,KC_P7,KC_P8,KC_P9,KC_PMNS, + KC_CAPS,KC_A,KC_S,KC_D,KC_F,KC_G,KC_H,KC_J,KC_K,KC_L, KC_SCLN, KC_QUOT, KC_ENT,KC_P4, KC_P5, KC_P6,KC_PPLS, + KC_LSFT,KC_Z,KC_X,KC_C,KC_V,KC_B,KC_N,KC_M,KC_COMM,KC_DOT,KC_SLSH,KC_RSFT,MO(1),KC_UP, KC_P1, KC_P2, KC_P3, KC_PENT, + KC_LCTL, KC_LGUI, KC_LALT, KC_SPC, KC_RALT,KC_MENU, KC_RCTL, KC_LEFT, KC_DOWN, KC_RGHT, KC_P0, KC_PDOT, KC_PENT), + + [1] = LAYOUT_all( /* Function */ + + _______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______, + _______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______, + _______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______, + _______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______, + _______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,_______,MO(1),_______,_______,_______,_______,_______, + _______,_______,_______, _______, _______,_______, _______,_______,_______,_______,_______,_______,_______), +}; diff --git a/keyboards/tkc/california/keymaps/via/rules.mk b/keyboards/tkc/california/keymaps/via/rules.mk new file mode 100644 index 0000000000..36b7ba9cbc --- /dev/null +++ b/keyboards/tkc/california/keymaps/via/rules.mk @@ -0,0 +1,2 @@ +VIA_ENABLE = yes +LTO_ENABLE = yes diff --git a/keyboards/tkc/california/readme.md b/keyboards/tkc/california/readme.md new file mode 100644 index 0000000000..d8717ee6ea --- /dev/null +++ b/keyboards/tkc/california/readme.md @@ -0,0 +1,21 @@ +# TKC California + +![TKC California](https://i.imgur.com/IaG5Gvph.jpg) + +A compact 1800 keyboard. + +* Keyboard Maintainer: [TerryMathews](https://github.com/TerryMathews) +* Hardware Supported: TKC California (ATmega32U4) +* Hardware Availability: TBA + +Reset board into bootloader by holding down Esc key while plugging in USB-C cable. + +Make example for this keyboard (after setting up your build environment): + + make tkc/california:default + +Flashing example for this keyboard: + + make tkc/california:default:flash + +See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs). diff --git a/keyboards/tkc/california/rules.mk b/keyboards/tkc/california/rules.mk new file mode 100644 index 0000000000..1c4073c9ce --- /dev/null +++ b/keyboards/tkc/california/rules.mk @@ -0,0 +1,18 @@ +# MCU name +MCU = atmega32u4 + +# Bootloader selection +BOOTLOADER = atmel-dfu + +# Build Options +# change yes to no to disable +# +BOOTMAGIC_ENABLE = yes # Enable Bootmagic Lite +MOUSEKEY_ENABLE = yes # Mouse keys +EXTRAKEY_ENABLE = yes # Audio control and System control +CONSOLE_ENABLE = no # Console for debug +COMMAND_ENABLE = no # Commands for debug and configuration +NKRO_ENABLE = yes # Enable N-Key Rollover +BACKLIGHT_ENABLE = yes # Enable keyboard backlight functionality +RGBLIGHT_ENABLE = no # Enable keyboard RGB underglow +AUDIO_ENABLE = no # Audio output